Device	Interface	IP address	Interface description and peer device and interface
Spine 1	HGE2/0/1	N/A	IPP Spine 2: HGE2/0/1
	HGE2/0/2	2.0.0.1/30	Keepalive interface Spine 2: HGE2/0/2
	HGE1/0/5	25.1.1.1/24	Router: HGE1/0/25
	FGE3/0/1	N/A	Leaf 1: FGE1/0/50
	FGE3/0/2	N/A	Leaf 2: FGE1/0/50
	FGE3/0/3	N/A	Leaf 3: FGE1/0/50
	FGE3/0/4	N/A	Leaf 4: FGE1/0/50
	Vlan-interface21	21.1.1.1/24	Leaf 1 and Leaf 2 Service VLAN
	Vlan-interface31	31.1.1.1/24	Leaf 3 and Leaf 4 Service VLAN
	Vlan-interface2000	192.168.2.1/30	East-west failover VLAN
Spine 2	HGE2/0/1	N/A	IPP Spine 1: HGE2/0/1
	HGE2/0/2	2.0.0.2/30	Keepalive interface Spine 1: HGE2/0/2
	HGE2/0/3	23.1.1.1/24	Router: HGE1/0/26
	FGE3/0/1	N/A	Leaf 1: FGE1/0/49
	FGE3/0/2	N/A	Leaf 2: FGE1/0/49
	FGE3/0/3	N/A	Leaf 3: FGE1/0/49
	FGE3/0/4	N/A	Leaf 4: FGE1/0/49
	Vlan-interface21	21.1.1.1/24	Leaf 1 and Leaf 2 Service VLAN
	Vlan-interface31	31.1.1.1/24	Leaf 3 and Leaf 4 Service VLAN
	Vlan-interface2000	192.168.2.2/30	East-west failover VLAN
Leaf 1	XGE1/0/1	N/A	Member port of a DR interface Server A
	FGE1/0/49	N/A	Spine 2: FGE3/0/1
	FGE1/0/50	N/A	Spine 1: FGE3/0/1
	FGE1/0/51	N/A	IPP Leaf 2: FGE1/0/51
	FGE1/0/52	1.0.0.1/30	Keepalive interface Leaf 2: FGE1/0/52
	FGE1/0/53	N/A	Single-homed link Server C
Leaf 2	XGE1/0/1	N/A	Member port of a DR interface Server A
	FGE1/0/49	N/A	Spine 2: FGE3/0/2
	FGE1/0/50	N/A	Spine 1: FGE3/0/2
	FGE1/0/51	N/A	IPP Leaf 1: FGE1/0/51
	FGE1/0/52	1.0.0.2/30	Keepalive interface Leaf 1: FGE1/0/52
Leaf 3	XGE1/0/1	N/A	Member port of a DR interface Server B
	FGE1/0/49	N/A	Spine 2: FGE3/0/3
	FGE1/0/50	N/A	Spine 1: FGE3/0/3
	FGE1/0/51	N/A	IPP Leaf 4: FGE1/0/51
	FGE1/0/52	1.0.0.5/30	Keepalive interface Leaf 4: FGE1/0/52
Leaf 4	XGE1/0/1	N/A	Member port of a DR interface Server B
	FGE1/0/49	N/A	Spine 2: FGE3/0/4
	FGE1/0/50	N/A	Spine 1: FGE3/0/4
	FGE1/0/51	N/A	IPP Leaf 3: FGE1/0/51
	FGE1/0/52	1.0.0.6/30	Keepalive interface Leaf 3: FGE1/0/52
Router	HGE1/0/25	25.1.1.2	Spine 1: HGE2/0/3
Router	HGE1/0/26	23.1.1.2	Spine 2: HGE2/0/3

Applicable product matrix

IMPORTANT:

In addition to running an applicable software version, you must also install the most recent patch, if any.

Role	Device	Software version
Spine	S12500X-AF	R2820
Spine	S12500G-AF	R7624P12
Border or leaf	S6800, S6860	F2715 and higher F27xx or R27xx versions Do not use F28xx or R28xx versions.
	S6805, S6825, S6850, S9850, S9820-64H, S9820-8C	R6635
	S6890	R2820
	S6812, S6813	Under development. To obtain the latest images, contact Technical Support.

Restrictions and guidelines

· The member devices in a DR system must use the same DR system MAC address. Different DR systems must each have a unique DR system MAC address on the network.

· As a best practice, run a dynamic routing protocol between the spine devices and the external network. If you use static routing, traffic interruption might occur upon the reboot of a spine device. This issue typically occurs if the service module accommodating an IPP, keepalive interface, or DR interface requires longer time to reboot than other service modules. To resolve the traffic interruption issue, use one of the following methods:

¡ Select an interface operating at the same speed from each service module and assign the interfaces to the aggregation group of the IPP. This method ensures that the IPP recovers prior to other interfaces. If you select interfaces operating at different speeds, execute the link-aggregation ignore speed command on the IPP. This method might result in traffic congestion or uneven traffic distribution on aggregate links as the number of selected ports might be insufficient.

¡ Create a monitor link group on the spine devices. Configure the router-facing interfaces as uplink interfaces for the monitor link group, and the member interfaces of leaf-facing DR interfaces as downlink interfaces. This method ensures that the uplink interfaces come up prior to the downlink DR interfaces. If you use this method, you must manually change the downlink interfaces in the monitor link group in response to deletion or addition of DR groups and membership changes of DR groups.

Configuring the leaf nodes

Procedure summary

· Configuring DRNI

· Configuring the links towards the servers

· Configuring the interfaces facing single-homed downstream devices

· Configuring the links towards the spine tier

NOTE:

The configuration of Leaf 3 and Leaf 4 is similar to that of Leaf 1 and Leaf 2. This configuration example provides only configuration tasks for Leaf 1 and Leaf 2.

Configuring DRNI

Leaf 1 (S6800)	Leaf 2 (S6800)	Configuration method	Description	Remarks
interface FortyGigE1/0/52	interface FortyGigE1/0/52	Manual	Enter the interface view for the keepalive link.	N/A
port link-mode route	port link-mode route	Manual	Configure the interface for keepalive detection to operate in route mode as a Layer 3 interface.	N/A
ip address 1.0.0.1 255.255.255.252	ip address 1.0.0.2 255.255.255.252	Manual	Assign an IP address to the keepalive interface.	N/A
quit	quit	Manual	Return to system view.	N/A
drni system-mac 00e0-fc00-5800	drni system-mac 00e0-fc00-5800	Manual	Set the MAC address of the DR system.	You must assign the same DR system MAC address to the member devices in a DR system.
drni system-number 1	drni system-number 2	Manual	Set the DR system number.	You must assign different DR system numbers to the member devices in a DR system.
drni system-priority 100	drni system-priority 100	Manual	(Optional.) Set the DR system priority.	You must set the same DR system priority on the member devices in a DR system. The default DR system priority is 32768. The smaller the value, the higher the priority.
drni standalone enable	drni standalone enable	Manual	Enable DRNI standalone mode.	N/A
drni keepalive ip destination 1.0.0.2 source 1.0.0.1	drni keepalive ip destination 1.0.0.1 source 1.0.0.2	Manual	Configure the destination and source IP addresses of keepalive packets.	Exclude the interfaces providing the source and destination IP addresses from the shutdown action by DRNI MAD.
drni mad exclude interface FortyGigE1/0/52	drni mad exclude interface FortyGigE1/0/52	Manual	Exclude the keepalive interface from the shutdown action by DRNI MAD.	N/A
drni restore-delay 300	drni restore-delay 300	Manual	Set the data restoration interval.	This parameter ensures that forwarding entry synchronization finishes before interfaces are brought up.
interface Bridge-Aggregation1	interface Bridge-Aggregation1	Manual	Create a Layer 2 aggregate interface and enter its view.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan all	port trunk permit vlan all	Manual	Configure the trunk interface to permit all VLANs.	N/A
interface FortyGigE1/0/51	interface FortyGigE1/0/51	Manual	Enter interface view.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan all	port trunk permit vlan all	Manual	Configure the trunk interface to permit all VLANs.	N/A
port link-aggregation group 1	port link-aggregation group 1	Manual	Assign the interface to aggregation group 1.	N/A
interface Bridge-Aggregation1	interface Bridge-Aggregation1	Manual	Enter Layer 2 aggregate interface view.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port drni intra-portal-port 1	port drni intra-portal-port 1	Manual	Specify the aggregate interface as an IPP.	N/A
undo mac-address static source-check enable	undo mac-address static source-check enable	Manual	Disable static source check.	Disable static source check on the IPP and spine-facing uplink interfaces.

Configuring the links towards the servers

Leaf 1 (S6800)	Leaf 2 (S6800)	Configuration method	Description	Remarks
VLAN 21	VLAN 21	Manual	Create VLAN 21.	N/A
quit	quit	Manual	Return to the previous view.	N/A
interface Bridge-Aggregation101	interface Bridge-Aggregation101	Manual	Create an aggregate interface and enter its view. This interface will be assigned to a server-facing DR group.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port drni group 1	port drni group 1	Manual	Assign the aggregate interface to DR group 1.	N/A
port lacp system-priority 101	port lacp system-priority 100	Manual	Set the LACP priority.	Set different LACP priorities for different DR member devices, so that only member ports with a higher priority are selected upon brain split.
quit	quit	Manual	Return to the previous view.	N/A
interface Ten-GigabitEthernet1/0/1	interface Ten-GigabitEthernet 1/0/1	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
port link-aggregation group 101	port link-aggregation group 101	Manual	Assign the interface to aggregation group 101.	N/A
quit	quit	Manual	Return to the previous view.	N/A

Configuring the interfaces facing single-homed downstream devices

Leaf 1 (S6800)	Leaf 2 (S6800)	Configuration method	Description
interface FortyGigE1/0/53	interface FortyGigE1/0/53	Manual	Enter the view of a DR aggregation member port.
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.

IMPORTANT:

To prevent an IPL down event from triggering the DRNI MAD DOWN action on the secondary DR device, attach a single-homed downstream device to the primary DR device.

Configuring the links towards the spine tier

Leaf 1 (S6800)	Leaf 2 (S6800)	Configuration method	Description	Remarks
interface Bridge-Aggregation102	interface Bridge-Aggregation102	Manual	Create an aggregate interface to be assigned to a DR group and enter aggregate interface view.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port drni group 2	port drni group 2	Manual	Assign the aggregate interface to DR group 2.	N/A
port lacp system-priority 101	port lacp system-priority 100	Manual	Set the LACP priority.	Set different LACP priorities for different DR member devices, so that only member ports with a higher priority are selected upon brain split.
quit	quit	Manual	Return to the previous view.	N/A
interface FortyGigE1/0/49	interface FortyGigE1/0/49	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
port link-aggregation group 102	port link-aggregation group 102	Manual	Assign the interface to aggregation group 102.	N/A
interface FortyGigE1/0/50	interface FortyGigE1/0/50	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
port link-aggregation group 102	port link-aggregation group 102	Manual	Assign the interface to aggregation group 102.	N/A
quit	quit	Manual	Return to the previous view.	N/A

Configuring the spine nodes

Procedure summary

· Configuring DRNI

· Configuring the links towards the leaf tier

· Configuring the dual-active VLAN gateways

· Configuring the interfaces connected to the external network

Configuring DRNI

Spine 1	Spine 2	Configuration method	Description	Remarks
interface HundredGigE2/0/2	interface HundredGigE2/0/2	Manual	Enter the interface view for the keepalive link.	N/A
port link-mode route	port link-mode route	Manual	Configure the interface for keepalive detection to operate in route mode as a Layer 3 interface.	N/A
ip address 2.0.0.1 255.255.255.252	ip address 2.0.0.2 255.255.255.252	Manual	Assign an IP address to the interface.	N/A
quit	quit	Manual	Return to system view.	N/A
drni restore-delay 300	drni restore-delay 300	Manual	Set the data restoration interval.	Set this parameter to 200 on a fixed-port device.
drni role priority 100	drni role priority 101	Manual	Set DR role priority.	The DR member devices negotiate their DR roles based on the DR role priority. The smaller the value, the higher the priority to be the primary DR devices.
drni system-mac 542b-de0c-0300	drni system-mac 542b-de0c-0300	Manual	Set the MAC address of the DR system.	You must assign the same DR system MAC address to the member devices in a DR system.
drni system-number 1	drni system-number 2	Manual	Set the DR system number.	You must assign different DR system numbers to the member devices in a DR system.
drni system-priority 100	drni system-priority 100	Manual	(Optional.) Set the DR system priority.	You must set the same DR system priority on the member devices in a DR system. The default DR system priority is 32768. The smaller the value, the higher the priority.
drni standalone enable	drni standalone enable	Manual	Enable DRNI standalone mode.	N/A
drni keepalive ip destination 2.0.0.2 source 2.0.0.1	drni keepalive ip destination 2.0.0.1 source 2.0.0.2	Manual	Configure the destination and source IP addresses of keepalive packets.	Specify a VPN instance according to the network environment. For the interfaces that will be shut down by DRNI MAD, exclude them from the DRNI MAD DOWN action as needed.
drni mad exclude interface HundredGigE2/0/2	drni mad exclude interface HundredGigE2/0/2	Manual	Exclude the keepalive interface from the shutdown action by DRNI MAD.	N/A
interface Bridge-Aggregation 1	interface Bridge-Aggregation 1	Manual	Create Bridge-Aggregation 1.	N/A
quit	quit	Manual	Return to system view.	N/A
interface HundredGigE2/0/1	interface HundredGigE2/0/1	Manual	Enter the view of a member port of the IPP.	N/A
port link-aggregation group 1	port link-aggregation group 1	Manual	Assign the interface to aggregation group 1.	N/A
quit	quit	Manual	Return to the previous view.	N/A
interface Bridge-Aggregation 1	interface Bridge-Aggregation 1	Manual	Enter the view of Bridge-Aggregation 1.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port drni intra-portal-port 1	port drni intra-portal-port 1	Manual	Specify the aggregate interface as an IPP.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan all	port trunk permit vlan all	Manual	Configure the trunk interface to permit all VLANs.	N/A
port trunk pvid vlan 4094	port trunk pvid vlan 4094	Manual	Set the PVID to 4094 for the trunk interface.	N/A

Configuring the links towards the leaf tier

Spine 1	Spine 2	Configuration method	Description	Remarks
Vlan 21 31	Vlan 21 31	Manual	Create VLANs.	N/A
quit	quit	Manual	Return to system view.	N/A
interface Bridge-Aggregation102	interface Bridge-Aggregation102	Manual	Enter the view of the DR group member aggregate interface connected to Leaf 1 and Leaf 2.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port lacp system-priority 101	port lacp system-priority 100	Manual	Set the LACP priority.	Set different LACP priorities for different DR member devices, so that only member ports with a higher priority are selected upon brain split.
port drni group 2	port drni group 2	Manual	Assign the aggregate interface to DR group 2.	N/A
interface FortyGigE 3/0/1	interface FortyGigE 3/0/1	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
port link-aggregation group 102	port link-aggregation group 102	Manual	Assign the interface to aggregation group 1.02	N/A
interface FortyGigE 3/0/2	interface FortyGigE 3/0/2	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 21	port trunk permit vlan 21	Manual	Assign the trunk interface to VLAN 21.	N/A
port link-aggregation group 102	port link-aggregation group 102	Manual	Assign the interface to aggregation group 1.02	N/A
quit	quit	Manual	Return to system view.	N/A
interface Bridge-Aggregation103	interface Bridge-Aggregation103	Manual	Enter the view of the DR group member aggregate interface connected to Leaf 3 and Leaf 4.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 31	port trunk permit vlan 31	Manual	Assign the trunk interface to VLAN 31.	N/A
link-aggregation mode dynamic	link-aggregation mode dynamic	Manual	Configure the aggregate interface to operate in dynamic mode.	N/A
port lacp system-priority 101	port lacp system-priority 100	Manual	Set the LACP priority.	Set different LACP priorities for different DR member devices, so that only member ports with a higher priority are selected upon brain split.
port drni group 3	port drni group 3	Manual	Assign the aggregate interface to DR group 2.	N/A
interface FortyGigE 3/0/3	interface FortyGigE 3/0/3	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 31	port trunk permit vlan 31	Manual	Assign the trunk interface to VLAN 31.	N/A
port link-aggregation group 103	port link-aggregation group 103	Manual	Assign the interface to aggregation group 1.03	N/A
interface FortyGigE3/0/4	interface FortyGigE3/0/4	Manual	Enter the view of a DR aggregation member port.	N/A
port link-type trunk	port link-type trunk	Manual	Set the link type of the interface to trunk.	N/A
port trunk permit vlan 31	port trunk permit vlan 31	Manual	Assign the trunk interface to VLAN 31.	N/A
port link-aggregation group 103	port link-aggregation group 103	Manual	Assign the interface to aggregation group 1.03	N/A
quit	quit	Manual	Return to the previous view.	N/A

Configuring the dual-active VLAN gateways

Spine 1	Spine 2	Configuration method	Description	Remarks
routing-interface base-mac 3c8c-4003-8ba5	routing-interface base-mac 3c8c-4003-8b41	Manual	Configure the base MAC address.	The base MAC address of Spine 2 is equal to that of Spine 1 + 0X64. This step only applies to S12500X-AF and S6890 switches.
interface Vlan-interface21	interface Vlan-interface21	Manual	Create the VLAN interface of VLAN 21, the service VLAN on Leaf 1 and Leaf 2.	N/A
ip address 21.1.1.1 255.255.255.0	ip address 21.1.1.1 255.255.255.0	Manual	Assign an IP address to the interface.	N/A
mac-address 3c8c-4003-8c08	mac-address 3c8c-4003-8c08	Manual	Assign a MAC address to the interface.	N/A
quit	quit	Manual	Return to the previous view.	N/A
drni mad exclude interface Vlan-interface21	drni mad exclude interface Vlan-interface21	Manual	Exclude the VLAN interface from the DRNI MAD DOWN action.	N/A
interface Vlan-interface31	interface Vlan-interface31	Manual	Create the VLAN interface of VLAN 31, the service VLAN on Leaf 3 and Leaf 4.	N/A
ip address 31.1.1.1 255.255.255.0	ip address 31.1.1.1 255.255.255.0	Manual	Assign an IP address to the interface.	N/A
mac-address 3c8c-4003-8c09	mac-address 3c8c-4003-8c09	Manual	Assign a MAC address to the interface.	N/A
quit	quit	Manual	Return to system view.	N/A
drni mad exclude interface Vlan-interface31	drni mad exclude interface Vlan-interface31	Manual	Exclude the VLAN interface from the DRNI MAD DOWN action.	N/A

IMPORTANT:

· On the S12500X-AF and S6890 switches, make sure the base MAC address plus the number of reserved MAC addresses produces a MAC address that has the same higher 36 bits as the base MAC address.

· You cannot edit or delete the base MAC address within 30 seconds after you configure it.

· When you assign a MAC address to a Layer 3 interface after the base MAC address configuration, make sure the following requirements are met:

¡ The MAC address must have the same higher 36 bits as the base MAC address.

¡ The MAC address must be no lower than the base MAC address plus the number of reserved MAC addresses

Configuring the interfaces connected to the external network

Spine 1	Spine 2	Configuration method	Description
ospf 1 router-id 2.1.1.1	ospf 1 router-id 2.1.1.2	Manual	Start an OSPF process.
import-route direct	import-route direct	Manual	Redistribute direct routes.
area 0.0.0.0	area 0.0.0.0	Manual	Create an OSPF area.
interface HundredGigE1/0/5	interface HundredGigE2/0/3	Manual	Enter the view of the router-facing interface.
port link-mode route	port link-mode route	Manual	Configure the interface for keepalive detection to operate in route mode as a Layer 3 interface.
ip address 25.1.1.1 255.255.255.0	ip address 23.1.1.1 255.255.255.0	Manual	Assign an IP address to the interface.
ospf 1 area 0.0.0.0	ospf 1 area 0.0.0.0	Manual	Enable OSPF on the interface.
quit	quit	Manual	Return to system view.
Vlan 2000	Vlan 2000	Manual	Create the east-west failover VLAN.
quit	quit	Manual	Return to system view.
interface Vlan-interface2000	interface Vlan-interface2000	Manual	Create the VLAN interface of the east-west failover VLAN.
ip address 192.168.2.1 255.255.255.252	ip address 192.168.2.2 255.255.255.252	Manual	Assign an IP address to the interface.
ospf 1 area 0.0.0.0	ospf 1 area 0.0.0.0	Manual	Enable OSPF on the VLAN interface.

Configuring the router

Router	Configuration method	Description
ospf 1 router-id 3.1.1.1	Manual	Start an OSPF process.
area 0.0.0.0	Manual	Create an OSPF area.
interface HundredGigE1/0/25	Manual	Enter the view of the interface connected to Spine 1.
port link-mode route	Manual	Configure the interface for keepalive detection to operate in route mode as a Layer 3 interface.
ip address 25.1.1.2 24	Manual	Assign an IP address to the interface connected to Spine 1.
ospf 1 area 0.0.0.0	Manual	Enable OSPF on the interface.
quit	Manual	N/A
interface HundredGigE1/0/26	Manual	Enter the view of the interface connected to Spine 2.
port link-mode route	Manual	Configure the interface for keepalive detection to operate in route mode as a Layer 3 interface.
ip address 23.1.1.2 24	Manual	Assign an IP address to the interface connected to Spine 2.
ospf 1 area 0.0.0.0	Manual	Enable OSPF on the interface.

Traffic forwarding models

The forwarding model matrix provides the following characteristics of traffic:

· No.—Traffic number in the U-X-XXX format:

¡ U—Underlay traffic.

¡ X—Protocol number, which can be 4 (IPv4).

¡ XXX—Traffic sequence number, starting from 201.

· Traffic type—Type of underlay traffic, which can be IPv4 known unicast.

· Direction—Direction of underlay traffic, which can be south-north or east-west across leaf DR systems.

· Forwarding path—Nodes that underlay traffic traverses.

· Traffic simulation—Traffic simulation method. Typically, a tester is used to simulate server traffic.

· Load—Traffic size, which can be light (less than 1000 flows) and heavy (more than 1000 flows).

Table 1 Traffic forwarding models

No.	Traffic type	Direction	Forwarding path	Traffic simulation	Load	Remarks
U-4-201	IPv4 known unicast	East-west across leaf DR systems	Server A > Leaf 1 & Leaf 2 > Spine 1 & Spine 2 > Leaf 3 & Leaf 4 > Server B	Bond4+ tester	Light	Layer 3 forwarding between PMs.
U-4-202	IPv4 known unicast	East-west across leaf DR systems	Server B > Leaf 1 & Leaf 2 > Spine 1 & Spine 2 > Leaf 1 & Leaf 2 > Server A	Bond4+ tester	Light	Layer 3 forwarding between PMs.
U-4-203	IPv4 known unicast	South-north	Server A > Leaf 1 & Leaf 2 > Spine 1 & Spine 2 > Router	Bond4+ tester	Light	Layer 3 forwarding between PMs and the external network.
U-4-204	IPv4 known unicast	South-north	Router > Spine 1 & Spine 2 > Leaf 1 & Leaf 2 > Server A	Bond4+ tester	Light	Layer 3 forwarding between PMs and the external network.
U-4-205	IPv4 known unicast	East-west across leaf DR systems	Server C > Leaf 1 > Spine 1 & Spine 2 > Leaf 3 & Leaf 4 > Server B	Bond4+ tester	Light	Layer 3 forwarding between PMs.
U-4-206	IPv4 known unicast	East-west across leaf DR systems	Server B > Leaf 3 & Leaf 4 > Spine 1 & Spine 2 > Leaf 1 > Server C	Bond4+ tester	Light	Layer 3 forwarding between PMs.
U-4-207	IPv4 known unicast	South-north	Server C > Leaf 1 > Spine 1 & Spine 2 > Router	Bond4+ tester	Light	Layer 3 forwarding between PMs and the external network.
U-4-208	IPv4 known unicast	South-north	Router > Spine 1 & Spine 2 > Leaf 1 > Server C	Bond4+ tester	Light	Layer 3 forwarding between PMs and the external network.

Testing network convergence upon single points of failure

Table 2 Network convergence upon single points of failure

Device	Failure type	Traffic interruption time
DR system at the spine or leaf tier	Single point of failure on DR member links	≤ 500 ms
	Single point of failure restored on DR member links	0 ms
	IPL failure	For DR member links: ≤ 500 ms For a link attached to a single-homed device: · If the DRNI MAD DOWN action is not triggered on the attached DR member device, east-west traffic resumes after the IPL recovers. · If the DRNI MAD DOWN action has been triggered on the attached DR member device, traffic resumes after the IPL and the single-homed link recover.
	IPL failure restored	0 ms
	Keepalive link failure	0 ms
	Keepalive link failure restored	0 ms
	Keepalive link and IPL failure	≤ 5000 ms
	Keepalive link and IPL restored	≤ 1000 ms
	Upgrading the devices	≤ 500 ms (legacy method, in which two DR member devices are separately upgraded)
	Expanding the network	0 ms
	Replacing hardware	Fixed-port device: ≤ 500 ms Modular device: · Device replacement: ≤ 1000 ms. · Switching fabric module replacement: 0 ms. · Service module replacement: ≤ 500 ms.

Upgrading the devices

Upgrading the leaf devices

Checking the environment

Execute the commands in "Verifying the configuration" and the following commands to verify that a device is available for an upgrade.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Upgrading the devices

See H3C Switches DR System Upgrade & Replacement & Expansion Guide.

Verifying the traffic interruption time during the upgrade

Verify that the traffic interruption time is shorter than 500 ms during a switchover and shorter than 150 ms during fallback when the traffic load is light. For more information, see "Testing network convergence upon single points of failure."

Verifying the upgrade result

Execute the commands in "Verifying the configuration" and the following commands to verify that the device is upgraded successfully.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Upgrading the spine nodes

Checking the environment

Execute the commands in "Verifying the configuration" and the following commands to verify that a device is available for an upgrade.

Spine 1	Spine 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Upgrading the devices

See H3C Switches DR System Upgrade & Replacement & Expansion Guide.

Verifying the traffic interruption time during the upgrade

Verifying the upgrade result

Execute the commands in "Verifying the configuration" and the following commands to verify that the device is upgraded successfully.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Expanding the network

An expansion operation adds two leaf devices.

Checking the environment

Execute the commands in "Verifying the configuration" and the following commands to verify that a device is available for an expansion.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Expanding the network

1. Disconnect the device from network management systems.

2. Upgrade the software of the device as needed.

3. Preconfigure the device.

4. Connect the device to network management systems.

5. Incorporate the device on the controller.

Verifying the traffic interruption time

For more information, see "Testing network convergence upon single points of failure."

Verifying the expansion result

Execute the following commands to verify that the device is added successfully.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Replacing hardware

Replacing a service module

Checking the environment

Execute the commands in "Verifying the configuration" and the following commands to verify that the target device is available for a replacement.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Replacing hardware

Switch service and management traffic on the target service module to other service modules.

Power off the device and replace the service module, or replace the service module when the device is running. For more information, see the installation guides for the service module.

For details, see H3C Switches DR System Upgrade & Replacement & Expansion Guide.

Verifying the traffic interruption time

For more information, see "Testing network convergence upon single points of failure."

Verifying the replacement result

Execute the commands in "Checking the environment."

Replacing a switching fabric module

Checking the environment

Execute the commands in "Verifying the configuration" and the following commands to verify that the target device is available for a replacement.

Leaf 1	Leaf 2	Description
display device	display device	Displays device information.
display boot-loader	display boot-loader	Displays current software images and startup software images.
display version	display version	Displays system version information.

Replacing hardware

Power off the device and replace the switching fabric module, or replace the switching fabric module when the device is running. For more information, see the installation guides for the switching fabric module.

Verifying the traffic interruption time

For more information, see "Testing network convergence upon single points of failure."

Verifying the replacement result

Execute the commands in "Checking the environment."

Verifying the configuration

Commands used for verifying the configuration

Leaf 1	Leaf 2	Description
display drni summary	display drni summary	Displays summary information about the IPP and DR interfaces.
display drni system	display drni system	Displays the DR system settings.
display drni keepalive	display drni keepalive	Displays DR keepalive packet statistics.
display drni role	display drni role	Displays DR role information.
display drni consistency { type1 \| type2 }	display drni consistency { type1 \| type2 }	Displays information about the configuration consistency check done by DRNI.
display drni consistency-check status	display drni consistency-check status	Displays the configuration consistency check status.
display interface Bridge-Aggregation [ brief ]	display interface Bridge-Aggregation [ brief ]	Displays information about Layer 2 aggregate interfaces.
display stp brief	display stp brief	Displays brief spanning tree status and statistics.

Verifying the status of a DR system

Verify that DRNI is working correctly on Spine 1 and Spine 2. Use Spine 1 as an example.

# Display summary information about the IPP and DR interfaces.

<Spine1>dis drni summary

Flags: A -- Aggregate interface down, B -- No peer DR interface configured

C -- Configuration consistency check failed

IPP: BAGG1

IPP state (cause): UP

Keepalive link state (cause): UP

DR interface information

DR interface DR group Local state (cause) Peer state Remaining down time(s)

BAGG102 2 UP UP -

BAGG103 3 UP UP -

# Verify that the DR system settings are correct.

<Spine1>dis drni system

System information

Local system number: 1 Peer system number: 2

Local system MAC: 542b-de0c-0300 Peer system MAC: 542b-de0c-0300

Local system priority: 100 Peer system priority: 100

Local bridge MAC: 5098-b8d3-7e00 Peer bridge MAC: 3c8c-4003-8b41

Local effective role: Primary Peer effective role: Secondary

Health level: 0

Standalone mode on split: Enabled

In standalone mode: No

System timer information

Timer State Value (s) Remaining time (s)

Auto recovery Disabled - -

Restore delay Disabled 60 -

Consistency-check delay Disabled 30 -

Standalone delay Disabled 0 -

Role to None delay Disabled 60 -

# Verify that the keepalive link is working correctly.

<Spine1>dis drni keepalive

Neighbor keepalive link status (cause): Up

Neighbor is alive for: 95299 s 891 ms

Keepalive packet transmission status:

Sent: Successful

Received: Successful

Last received keepalive packet information:

Source IP address: 2.0.0.2

Time: 2022/05/31 14:07:47

Action: Accept

Distributed relay keepalive parameters:

Destination IP address: 2.0.0.2

Source IP address: 2.0.0.1

Keepalive UDP port : 6400

Keepalive VPN name : N/A

Keepalive interval : 1000 ms

Keepalive timeout : 5 sec

Keepalive hold time: 3 sec

# Verify that Spine 1 is the primary DR device.

<Spine1> display drni role

Effective role information

Factors Local Peer

Effective role Primary Secondary

Initial role Primary Secondary

MAD DOWN state No No

Health level 0 0

Role priority 100 101

Bridge MAC 5098-b8d3-7e00 3c8c-4003-8b41

Effective role trigger: IPL calculation

Effective role reason: MAD status

Configured role information

Factors Local Peer

Configured role Primary Secondary

Role priority 100 101

Bridge MAC 5098-b8d3-7e00 3c8c-4003-8b41

# Verify that Spine 1 and Spine 2 have consistent configurations.

<Spine1>dis drni consistency-check status

Global Consistency Check Configuration

Local status : Enabled Peer status : Enabled

Local check mode : Strict Peer check mode : Strict

Consistency Check on Modules

Module Type1 Type2

LAGG Check Not Check

VLAN Check Check

STP Check Not Check

Type1 Consistency Check Result

Global consistency check result: SUCCESS

Inconsistent global modules: -

DR interface DR group ID Check Result Inconsistency modules

BAGG102 2 SUCCESS -

BAGG103 3 SUCCESS -

H3C Data Center Switches DRNI Configuration Guide-6W103

Example: Configuring multi-tier DRNI+spine gateways+ECMP paths to the external network

Restrictions and guidelines

Configuring the leaf nodes

Configuring DRNI

Configuring the links towards the servers

Configuring the interfaces facing single-homed downstream devices

Configuring the spine nodes

Configuring DRNI

Configuring the links towards the leaf tier

Checking the environment

Checking the environment

Upgrading the devices

Verifying the traffic interruption time during the upgrade

Verifying the upgrade result

Replacing hardware

Verifying the traffic interruption time

Verifying the replacement result

Replacing hardware

Verifying the traffic interruption time

Verifying the replacement result

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