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- Table of Contents
-
- 05-Network Connectivity
- 00-Preface
- 01-About the network connectivity configuration guide
- 02-MAC address table configuration
- 03-Ethernet link aggregation configuration
- 04-VLAN configuration
- 05-Loop detection configuration
- 06-Spanning tree configuration
- 07-LLDP configuration
- 08-Layer 2 forwarding configuration
- 09-L2TP configuration
- 10-ARP configuration
- 11-IP addressing configuration
- 12-DHCP configuration
- 13-DHCP snooping configuration
- 14-DHCPv6 configuration
- 15-DHCPv6 snooping configuration
- 16-DNS configuration
- 17-HTTP configuration
- 18-IP forwarding basics configuration
- 19-Fast forwarding configuration
- 20-Adjacency table configuration
- 21-IP performance optimization configuration
- 22-IPv6 basics configuration
- 23-IPv6 neighbor discovery configuration
- 24-IPv6 fast forwarding configuration
- 25-NAT configuration
- 26-Basic IP routing configuration
- 27-Static routing configuration
- 28-RIP configuration
- 29-OSPF configuration
- 30-Policy-based routing configuration
- 31-IPv6 policy-based routing configuration
- 32-IPv6 static routing configuration
- 33-RIPng configuration
- 34-GRE configuration
- 35-IPv6 transition technologies configuration
- 36-Multicast overview
- 37-IGMP snooping configuration
- 38-MLD snooping configuration
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 20-Adjacency table configuration | 44.80 KB |
Displaying the adjacency table
Displaying and maintaining the adjacency table
Displaying the adjacency table
About the adjacency table
The adjacency table stores information about directly connected neighbors for IP forwarding. The neighbor information in this chapter refers to non-Ethernet neighbor information.
This table is not user configurable. The neighbor information is generated, updated, and deleted by link layer protocols through negotiation (such as PPP dynamic negotiation) or through manual configuration (such as ATM static configuration). An adjacency entry includes the following information:
· Neighbor network layer address (next hop).
· Output interface.
· Link layer protocol type.
· Link layer address. This field displays PVC for ATM, and it is not available for PPP.
When forwarding an IP packet, the device performs the following tasks:
· Searches the FIB to find the output interface and next hop.
· Uses the output interface and next hop address to search the adjacency table for link layer forwarding information.
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NOTE: Ethernet and non-Ethernet neighbor information is stored and managed together. |
Displaying and maintaining the adjacency table
Displaying IPv4 adjacency table information
To display IPv4 adjacency table information, execute the following command in any view:
display adjacent-table { all | physical-interface interface-type interface-number | routing-interface interface-type interface-number } [ count | verbose ]
Displaying IPv6 adjacency table information
To display IPv6 adjacency table information, execute the following command in any view:
display ipv6 adjacent-table { all | physical-interface interface-type interface-number | routing-interface interface-type interface-number } [ count | verbose ]
