05-Layer 3-IP Routing Command Reference

HomeSupportResource CenterH3C S6850 & S9850 Switch Series Command References-Release 655x-6W10105-Layer 3-IP Routing Command Reference
02-Static routing commands
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02-Static routing commands 116.68 KB

Static routing commands

delete static-routes all

Use delete static-routes all to delete all static routes.

Syntax

delete [ vpn-instance vpn-instance-name ] static-routes all

Views

System view

Predefined user roles

network-admin

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, the command deletes all static routes for the public network.

Usage guidelines

When you use this command, the system will prompt you to confirm the operation before deleting all the static routes.

To delete one static route, use the undo ip route-static command. To delete all static routes, including the default route, use the delete static-routes all command.

Examples

# Delete all static routes.

<Sysname> system-view

[Sysname] delete static-routes all

This will erase all IPv4 static routes and their configurations, you must reconfigure all static routes.

Are you sure?[Y/N]:y

Related commands

ip route-static

display route-static nib

Use display route-static nib to display static route next hop information.

Syntax

display route-static nib [ nib-id ] [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

nib-id: Specifies a NIB by its ID, a hexadecimal string of 1 to ffffffff. If you do not specify this argument, the command displays all static route next hop information.

verbose: Displays detailed static route next hop information. If you do not specify this keyword, the command displays brief static route next hop information.

Examples

# Displays brief static route next hop information.

<Sysname> display route-static nib

Total number of nexthop(s): 44

 

      NibID: 0x11000000        Sequence: 0

       Type: 0x21               Flushed: Yes

   UserKey0: 0x111              VrfNthp: 0

   UserKey1: 0x0                Nexthop: 0.0.0.0

    IFIndex: 0x111            LocalAddr: 0.0.0.0

   TopoNthp: 0                  ExtType: 0x0

 

      NibID: 0x11000001        Sequence: 1

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 5

   UserKey1: 0x0                Nexthop: 2.2.2.2

    IFIndex: 0x0              LocalAddr: 0.0.0.0

   TopoNthp: 0                  ExtType: 0x0

 

...

Table 1 Command output

Field

Description

NibID

ID of the NIB.

Sequence

Sequence number of the NIB.

Type

Type of the NIB.

Flushed

Indicates whether the route with the NIB has been flushed to the FIB.

UserKey0

Reserved data 1.

UserKey1

Reserved data 2.

VrfNthp

Index of the VPN instance that the next hop belongs to. This field displays 0 if the next hop is on the public network.

Nexthop

Next hop address.

IFIndex

Interface index

LocalAddr

Local interface address.

TopoNthp

This field is not supported in the current software version.

Index of the topology that contains the next hop. This field displays 0 if the next hop is on the public network.

ExtType

NIB extension type.

 

# Displays detailed static route next hop information.

<Sysname> display route-static nib verbose

Total number of nexthop(s): 44

 

      NibID: 0x11000000        Sequence: 0

       Type: 0x21               Flushed: Yes

   UserKey0: 0x111              VrfNthp: 0

   UserKey1: 0x0                Nexthop: 0.0.0.0

    IFIndex: 0x111            LocalAddr: 0.0.0.0

   TopoNthp: 0                  ExtType: 0x0

     RefCnt: 2              FlushRefCnt: 0

       Flag: 0x2                Version: 1

 1 nexthop(s):

PrefixIndex: 0              OrigNexthop: 0.0.0.0

  RelyDepth: 0              RealNexthop: 0.0.0.0

  Interface: NULL0            LocalAddr: 0.0.0.0

  TunnelCnt: 0                      Vrf: default-vrf

   TunnelID: N/A               Topology: base

     Weight: 1000000

 

      NibID: 0x11000001        Sequence: 1

       Type: 0x41               Flushed: Yes

   UserKey0: 0x0                VrfNthp: 5

   UserKey1: 0x0                Nexthop: 2.2.2.2

    IFIndex: 0x0              LocalAddr: 0.0.0.0

   TopoNthp: 0                  ExtType: 0x0

     RefCnt: 1              FlushRefCnt: 0

       Flag: 0x12               Version: 1

 2 nexthop(s):

PrefixIndex: 0              OrigNexthop: 2.2.2.2

  RelyDepth: 7              RealNexthop: 8.8.8.8

  Interface: Vlan11           LocalAddr: 12.12.12.12

  TunnelCnt: 0                      Vrf: default-vrf

   TunnelID: N/A               Topology: base

     Weight: 1000000

PrefixIndex: 0              OrigNexthop: 2.2.2.2

  RelyDepth: 9              RealNexthop: 0.0.0.0

  Interface: NULL0            LocalAddr: 0.0.0.0

  TunnelCnt: 0                      Vrf: default-vrf

   TunnelID: N/A               Topology: base

     Weight: 1000000

 

...

Table 2 Command output

Field

Description

NibID

ID of the NIB.

Sequence

Sequence number of the NIB.

Type

Type of the NIB.

Flushed

Indicates whether the route with the NIB has been flushed to the FIB.

UserKey0

Reserved data 1.

VrfNthp

Index of the VPN instance that the next hop belongs to. This field displays 0 if the next hop is on the public network.

UserKey1

Reserved data 2.

Nexthop

Next hop address.

IFIndex

Interface index

LocalAddr

Local interface address.

TopoNthp

This field is not supported in the current software version.

Index of the topology that contains the next hop. This field displays 0 if the next hop is on the public network.

ExtType

NIB extension type.

RefCnt

Reference count of the next hop.

FlushRefCnt

Reference count of the next hop that is flushed to the FIB.

Flag

Flag of the next hop.

Version

Version of the next hop.

x nexthop(s)

Number of next hops.

PrefixIndex

Prefix index of the next hop for an ECMP route.

OrigNexthop

Original next hop.

RelyDepth

Recursion depth.

RealNexthop

Real next hop.

Interface

Output interface.

localAddr

Local interface address.

TunnelCnt

Number of tunnels after route recursion.

Vrf

VPN instance name. For the public network, this field displays default-vrf.

TunnelID

ID of the tunnel after route recursion.

Topology

This field is not supported in the current software version.

Topology name. The topology name for the public network is base.

Weight

ECMP route weight. This field displays 0 for non-ECMP routes.

display route-static routing-table

Use display route-static routing-table to display static routing table information.

Syntax

display route-static routing-table [ vpn-instance vpn-instance-name ] [ ip-address { mask-length | mask } ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, the command displays static routing table information for the public network.

ip-address: Specifies the destination IP address in dotted decimal notation. If you do not specify this argument, the command displays all static routing table information.

mask-length: Specifies the mask length, an integer in the range of 0 to 32.

mask: Specifies the subnet mask in dotted decimal notation.

Examples

# Display static routing table information.

<Sysname> display route-static routing-table

Total number of routes: 24

 

Status: * - valid

 

*Destination: 0.0.0.0/0

       NibID: 0x1100000a         NextHop: 2.2.2.10

   MainNibID: N/A              BkNextHop: N/A

     BkNibID: N/A              Interface: Vlan-interface11

     TableID: 0x2            BkInterface: Vlan-interface12

        Flag: 0x82d01           BfdSrcIp: N/A

     DbIndex: 0xd             BfdIfIndex: 0x0

        Type: Normal         BfdVrfIndex: 0

  TrackIndex: 0xffffffff           Label: NULL

  Preference: 60             vrfIndexDst: 0

     BfdMode: N/A             vrfIndexNH: 0

   Permanent: 0                      Tag: 0

 

 Destination: 0.0.0.0/0

       NibID: 0x1100000b         NextHop: 2.2.2.11

   MainNibID: N/A              BkNextHop: N/A

     BkNibID: N/A              Interface: Vlan-interface13

     TableID: 0x2            BkInterface: Vlan-interface14

        Flag: 0x82d01           BfdSrcIp: N/A

     DbIndex: 0xd             BfdIfIndex: 0x0

        Type: Normal         BfdVrfIndex: 0

  TrackIndex: 0xffffffff           Label: NULL

  Preference: 60             vrfIndexDst: 0

     BfdMode: N/A             vrfIndexNH: 0

   Permanent: 0                      Tag: 0

 

...

Table 3 Command output

Field

Description

destination

Destination address/prefix.

NibID

ID of the NIB.

MainNibID

ID of the primary next hop for static route FRR.

BkNibID

ID of the backup next hop for static route FRR.

NextHop

Next hop address.

BkNextHop

Backup next hop address.

Interface

Output interface of the route.

BkInterface

Backup output interface.

TableID

ID of the table to which the route belongs.

Flag

Flag of the route.

DbIndex

Index of the database to which the route belongs.

Type

Route type:

·     Normal.

·     DHCP.

·     IPsec.

BfdSrcIp

Source IP address of the indirect BFD session.

BfdIfIndex

Index of the interface where BFD is enabled.

BfdVrfIndex

Index of the VPN instance where BFD is enabled. This field displays 0 if BFD is enabled for the public network.

BfdMode

BFD session mode:

·     N/A—No BFD session is configured.

·     Ctrl—Control packet mode

·     Echo—Echo packet mode.

TrackIndex

NQA Track index.

vrfIndexDst

Index of VPN instance that the destination belongs to. For the public network, this field displays 0.

vrfIndexNH

Index of the VPN instance that the next hop belongs to. For the public network, this field displays 0.

Permanent

Permanent static route flag. 1 indicates a permanent static route.

 

ip route-static

Use ip route-static to configure a static route.

Use undo ip route-static to delete a static route.

Syntax

ip route-static dest-address { mask-length | mask } interface-type interface-number [ next-hop-address [ nexthop-index index-string ] ] [ backup-interface interface-type interface-number [ backup-nexthop backup-nexthop-address ] [ permanent ] | bfd { control-packet | echo-packet } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static dest-address { mask-length | mask } next-hop-address [ nexthop-index index-string ] [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static dest-address { mask-length | mask } vpn-instance d-vpn-instance-name next-hop-address [ nexthop-index index-string ] [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static group group-name interface-type interface-number [ next-hop-address ] [ backup-interface interface-type interface-number [ backup-nexthop backup-nexthop-address ] [ permanent ] | bfd { control-packet | echo-packet } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static  group group-name next-hop-address [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static group group-name vpn-instance d-vpn-instance-name next-hop-address [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

undo ip route-static { dest-address { mask-length | mask } | group group-name } [ interface-type interface-number [ next-hop-address ] | next-hop-address | vpn-instance d-vpn-instance-name next-hop-address ] [ preference preference ]

Default

No static route is configured.

Views

System view

Predefined user roles

network-admin

Parameters

dest-address: Specifies the destination IP address of the static route, in dotted decimal notation.

mask-length: Specifies the mask length, an integer in the range of 0 to 32.

mask: Specifies the subnet mask in dotted decimal notation.

group group-name: Specifies a static route group by its name, a case-sensitive string of 1 to 31 characters.

vpn-instance d-vpn-instance-name: Specifies a destination MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If a destination VPN instance is specified, packets will search for the output interface in the destination VPN instance based on the configured next hop address.

interface-type interface-number: Specifies an output interface by its type and number. For more information, see Layer 3—IP Routing Configuration Guide.

next-hop-address: Specifies the IP address of the next hop, in dotted decimal notation. For more information, see Layer 3—IP Routing Configuration Guide.

nexthop-index index-string: Specifies the index of the next hop. The index-string argument represents the index, which is a case-insensitive string of 1 to 93 characters. If you do not specify an index for the next hop, the static route uses the output interface and the IP address of the next hop as the next hop index. Do not specify the same next hop index for routes to the same destination.

recursive-lookup host-route: Specifies only host routes for static route recursion.

backup-interface interface-type interface-number: Specifies a backup output interface by its type and number. If the backup output interface is an NBMA interface or broadcast interface and not a P2P interface, you must specify the backup next hop address.

backup-nexthop backup-nexthop-address: Specifies a backup next hop address.

bfd: Enables BFD to detect reachability of the static route's next hop. When the next hop is unreachable, the system immediately switches to the backup route.

control-packet: Specifies the BFD control packet mode.

bfd-source ip-address: Specifies the source IP address of BFD packets. As a best practice, specify the loopback interface address.

echo-packet: Specifies the BFD echo packet mode.

permanent: Specifies the route as a permanent static route. If the output interface is down, the permanent static route is still active.

track track-entry-number: Associates the static route with a track entry specified by its number in the range of 1 to 1024. For more information about Track, see High Availability Configuration Guide.

public: Indicates that the specified next hop address is on the public network.

preference preference: Specifies a preference for the static route, in the range of 1 to 255. The default is 60.

tag tag-value: Sets a tag value for marking the static route, in the range of 1 to 4294967295. The default is 0. Tags of routes are used for route control in routing policies. For more information about routing policies, see Layer 3—IP Routing Configuration Guide.

description text: Configures a description of 1 to 60 characters for the static route. The description can include special characters, such as the space, except the question mark (?).

Usage guidelines

If the destination IP address and the mask are both 0.0.0.0 (or 0), the configured route is a default route. The default route is used for forwarding a packet matching no entry in the routing table.

Implement different routing policies to configure different route preferences. For example, to enable load sharing for multiple routes to the same destination, assign the same preference to the routes. To enable the routes to back up one another, assign different preferences to them.

Follow these guidelines when you specify the output interface or the next hop address of the static route:

·     If the output interface is a Null 0 interface, no next hop address is required.

·     If the output interface is a point-to-point interface, you can specify only the output interface. You do not need to change the configuration of the route even if the peer address is changed.

·     NBMA or P2MP interfaces need IP address-to-link layer address mappings for successful packet delivery. As a best practice, specify the next hop address for the route at the same time if the output interface is an NBMA or P2MP interface.

·     If the output interface is a broadcast interface, the device uses the next hop IP address to obtain the MAC address of the next hop. Therefore, you must specify both the output interface and next hop IP address, except for certain cases such as the VXLAN across VPNs networking.

Follow these guidelines when you configure a static route:

·     Enabling BFD for a flapping route could worsen the route flapping situation. Therefore, use it with caution. For more information about BFD, see High Availability Configuration Guide.

·     For static routing-Track-NQA collaboration, you must configure the same VPN instance ID for the next hop to be detected and the NQA operation.

·     If a static route needs route recursion, the associated track entry must monitor the next hop of the related route instead of that of the recursive static route. Otherwise, a valid route might be mistakenly considered invalid.

·     Do not specify the permanent keyword together with the bfd or track keyword.

If you specify a static route group, all prefixes in the static route group will be assigned the next hop and output interface specified by using this command.

Examples

# Configure a static route, whose destination address is 1.1.1.1/24, next hop address is 2.2.2.2, tag value is 45, and description information is for internet.

<Sysname> system-view

[Sysname] ip route-static 1.1.1.1 24 2.2.2.2 tag 45 description for internet

Related commands

display ip routing-table protocol

ip route-static-group

prefix

ip route-static arp-request

Use ip route-static arp-request to enable periodic sending of ARP requests to the next hops of static routes.

Use undo ip route-static arp-request to disable periodic sending of ARP requests to the next hops of static routes.

Syntax

ip route-static arp-request [ interval interval ]

undo ip route-static arp-request

Default

Periodic sending of ARP requests to the next hops of static routes is disabled.

Views

System view

Predefined user roles

network-admin

Parameters

interval: Specifies an ARP request sending interval in the range of 1 to 300 seconds. The default value is 5.

Usage guidelines

When the following conditions exist, a recursive static route becomes inactive:

·     The static route uses a host route to reach its direct next hop.

·     The host route is obtained either by specifying the recursive-lookup host-route keyword in the ip route-static command or by routing policy-based recursive lookup.

·     The host route is unavailable because the direct next hop cannot send gratuitous ARP messages and consequently no ARP entry exists for that host route on the device.

To resolve this issue, you can use this command to enable the device to periodically send ARP requests to the direct next hop. When the device receives an ARP response from the direct next hop, it stops sending ARP requests and activates the recursive static route.

This command applies only to a recursive static route that meets the following requirements:

·     The static route has no output interface specified.

·     The static route fails the next-hop recursion.

Examples

# Enable sending of ARP requests to the next hops of static routes and set the sending interval to 10 seconds.

<Sysname> system-view

[Sysname] ip route-static arp-request interval 10

Related commands

ip route-static

protocol nexthop recursive-lookup

ip route-static default-preference

Use ip route-static default-preference to configure a default preference for static routes.

Use undo ip route-static default-preference to restore the default.

Syntax

ip route-static default-preference default-preference

undo ip route-static default-preference

Default

The default preference of static routes is 60.

Views

System view

Predefined user roles

network-admin

Parameters

default-preference: Specifies a default preference for static routes, in the range of 1 to 255.

Usage guidelines

If no preference is specified for a static route, the default preference applies.

When the default preference is reconfigured, it applies only to newly added static routes.

Examples

# Set a default preference of 120 for static routes.

<Sysname> system-view

[Sysname] ip route-static default-preference 120

Related commands

display ip routing-table protocol

ip route-static fast-reroute auto

Use ip route-static fast-reroute auto to configure static route FRR to automatically select a backup next hop.

Use undo ip route-static fast-reroute auto to disable static route FRR from automatically selecting a backup next hop.

Syntax

ip route-static fast-reroute auto

undo ip route-static fast-reroute auto

Default

Static route FRR is disabled from automatically selecting a backup next hop.

Views

System view

Predefined user roles

network-admin

Examples

# Configure static route FRR to automatically select a backup next hop.

<Sysname> system-view

[Sysname] ip route-static fast-reroute auto

ip route-static primary-path-detect bfd echo

Use ip route-static primary-path-detect bfd echo to enable BFD echo packet mode for static route FRR.

Use undo ip route-static primary-path-detect bfd to disable BFD echo packet mode for static route FRR.

Syntax

ip route-static primary-path-detect bfd echo

undo ip route-static primary-path-detect bfd

Default

BFD echo packet mode for static route FRR is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This command enables static route FRR to use BFD echo packet mode for fast failure detection on the primary link.

Examples

# Enable BFD echo packet mode for static route FRR.

<Sysname> system-view

[Sysname] ip route-static 1.1.1.1 32 vlan-interface 10 2.2.2.2 backup-interface vlan-interface 11 backup-nexthop 3.3.3.3

[Sysname] ip route-static primary-path-detect bfd echo

ip route-static vpn-instance

Use ip route-static vpn-instance to configure a static route in a VPN instance.

Use undo ip route-static to delete a static route from a VPN instance.

Syntax

ip route-static vpn-instance s-vpn-instance-name dest-address { mask-length | mask } interface-type interface-number [ next-hop-address [ nexthop-index index-string ] ] [ backup-interface interface-type interface-number [ backup-nexthop backup-nexthop-address ] [ permanent ] | bfd { control-packet | echo-packet } | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name dest-address { mask-length | mask } vpn-instance d-vpn-instance-name next-hop-address [ nexthop-index index-string ] [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name dest-address { mask-length | mask } next-hop-address [ nexthop-index index-string ] [ public ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name dest-address { mask-length | mask } vpn-instance d-vpn-instance-name next-hop-address [ nexthop-index index-string ] [ recursive-lookup host-route ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name dest-address { mask-length | mask } next-hop-address [ nexthop-index index-string ] [ recursive-lookup host-route ] [ public ] [ bfd control-packet bfd-source ip-address ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name group group-name interface-type interface-number [ next-hop-address ] [ bfd { control-packet | echo-packet } | backup-interface interface-type interface-number [ backup-nexthop backup-nexthop-address ] [ permanent ] ] [ preference preference ] [ tag tag-value ] [ description text ]

ip route-static vpn-instance s-vpn-instance-name group group-name next-hop-address [ recursive-lookup host-route ] [ public ] [ bfd control-packet bfd-source ip-address | permanent | track track-entry-number ] [ preference preference ] [ tag tag-value ] [ description text ]

undo ip route-static vpn-instance s-vpn-instance-name { dest-address { mask-length | mask } | group group-name } [ interface-type interface-number [ next-hop-address ] | next-hop-address [ public ] | vpn-instance d-vpn-instance-name next-hop-address ] [ preference preference ]

Default

No static route is configured in a VPN instance.

Views

System view

Predefined user roles

network-admin

Parameters

s-vpn-instance-name: Specifies a source MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. Each VPN instance has its own routing table, and the configured static route is installed in the routing tables of the specified VPN instances.

dest-address: Specifies the destination IP address of the static route, in dotted decimal notation.

mask-length: Specifies the mask length, an integer in the range of 0 to 32.

mask: Specifies the subnet mask in dotted decimal notation.

group group-name: Specifies a static route group by its name, a case-sensitive string of 1 to 31 characters.

vpn-instance d-vpn-instance-name: Specifies a destination MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If a destination VPN instance is specified, packets will search for the output interface in the destination VPN instance based on the configured next hop address.

interface-type interface-number: Specifies an output interface by its type and number. For more information, see Layer 3—IP Routing Configuration Guide.

next-hop-address: Specifies the IP address of the next hop, in dotted decimal notation. For more information, see Layer 3—IP Routing Configuration Guide.

nexthop-index index-string: Specifies the index of the next hop. The index-string argument represents the index, which is a case-insensitive string of 1 to 93 characters. If you do not specify an index for the next hop, the static route uses the output interface and the IP address of the next hop as the next hop index. Do not specify the same next hop index for routes to the same destination.

recursive-lookup host-route: Specifies only host routes for static route recursion.

backup-interface interface-type interface-number: Specifies a backup output interface by its type and number. If the backup output interface is an NBMA interface or broadcast interface and not a P2P interface, you must specify the backup next hop address.

backup-nexthop backup-nexthop-address: Specifies a backup next hop address.

bfd: Enables BFD to detect reachability of the static route's next hop. When the next hop is unreachable, the system immediately switches to the backup route.

control-packet: Specifies the BFD control packet mode.

bfd-source ip-address: Specifies the source IP address of BFD packets. As a best practice, specify the loopback interface address.

echo-packet: Specifies the BFD echo packet mode.

permanent: Specifies the route as a permanent static route. If the output interface is down, the permanent static route is still active.

track track-entry-number: Associates the static route with a track entry specified by its number in the range of 1 to 1024. For more information about Track, see High Availability Configuration Guide.

public: Indicates that the specified next hop address is on the public network.

preference preference: Specifies a preference for the static route, in the range of 1 to 255. The default is 60.

tag tag-value: Sets a tag value for marking the static route, in the range of 1 to 4294967295. The default is 0. Tags of routes are used for route control in routing policies. For more information about routing policies, see Layer 3—IP Routing Configuration Guide.

description text: Configures a description of 1 to 60 characters for the static route. The description can include special characters, such as the space, except the question mark (?).

Usage guidelines

If the destination IP address and the mask are both 0.0.0.0 (or 0), the configured route is a default route. The default route is used for forwarding a packet matching no entry in the routing table.

Implement different routing policies to configure different route preferences. For example, to enable load sharing for multiple routes to the same destination, assign the same preference to the routes. To enable the routes to back up one another, assign different preferences to them.

Follow these guidelines when you specify the output interface or the next hop address of the static route:

·     If the output interface is a Null 0 interface, no next hop address is required.

·     If the output interface is a point-to-point interface, you can specify only the output interface. You do not need to change the configuration of the route even if the peer address is changed.

·     NBMA or P2MP interfaces need IP address-to-link layer address mappings for successful packet delivery. As a best practice, specify the next hop address for the route at the same time if the output interface is an NBMA or P2MP interface.

·     If the output interface is a broadcast interface (for example, an Ethernet interface or VLAN interface), the device uses the next hop IP address to obtain the MAC address of the next hop. Therefore, you must specify both the output interface and next hop IP address.

Follow these guidelines when you configure a static route:

·     Enabling BFD for a flapping route could worsen the route flapping situation. Therefore, use it with caution. For more information about BFD, see High Availability Configuration Guide.

·     For static routing-Track-NQA collaboration, you must configure the same VPN instance ID for the next hop to be detected and the NQA operation.

·     If a static route needs route recursion, the associated track entry must monitor the next hop of the related route instead of that of the recursive static route. Otherwise, a valid route might be mistakenly considered invalid.

·     Do not specify the permanent keyword together with the bfd or track keyword.

If you specify a static route group, all prefixes in the static route group will be assigned the next hop and output interface specified by using this command.

Examples

# Configure a static route in VPN instance vpn1, whose destination address is 1.1.1.1/24, next hop address is 2.2.2.2 in VPN instance vpn2, tag value is 45, and description information is for internet.

<Sysname> system-view

[Sysname] ip route-static vpn-instance vpn1 1.1.1.1 24 vpn-instance vpn2 2.2.2.2 tag 45 description for internet

Related commands

display ip routing-table protocol

ip route-static-group

prefix

ip route-static-group

Use ip route-static-group to create a static route group and enter its view, or enter the view of an existing static route group.

Use undo ip route-static-group to delete a static route group.

Syntax

ip route-static-group group-name

undo ip route-static-group group-name

Default

No static route groups exist.

Views

System view

Predefined user roles

network-admin

Parameters

group-name: Specifies the static route group name, a case-sensitive string of 1 to 31 characters.

Examples

# Create static route group test and enter its view.

<Sysname> system-view

[Sysname] ip route-static-group test

[Sysname-route-static-group-test]

Related commands

ip route-static

prefix

prefix

Use prefix to add a static route prefix to a static route group.

Use undo prefix to delete a static route prefix from a static route group.

Syntax

prefix dest-address { mask-length | mask }

undo prefix dest-address { mask-length | mask }

Default

No static route prefix is added to a static route group.

Views

Static route group view

Predefined user roles

network-admin

Parameters

dest-address: Specifies the destination IP address of the static route, in dotted decimal notation.

mask-length: Specifies the mask length, an integer in the range of 0 to 32.

mask: Specifies the subnet mask in dotted decimal notation.

Usage guidelines

Execute this command repeatedly to add multiple static route prefixes to a static route group.

After you add static route prefixes to a static route group, you can specify that group in the ip route-static group command to configure static routes with the prefixes. To configure more static routes, you only need to add new static route prefixes to the group.

Examples

# Add static route prefix 1.1.1.1/32 to static route group test.

<Sysname> system-view

[Sysname] ip route-static-group test

[Sysname-route-static-group-test] prefix 1.1.1.1 32

Related commands

ip route-static

ip route-static-group