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Configuring the Switch
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Displaying Neighbor Information
You can display all the neighboring DVMRP routers.
Command Attributes
• Neighbor Address – The IP address of the network device immediately upstream
for this multicast delivery tree.
• Interface – The IP interface on this router that connects to the upstream neighbor.
• Up time – The time since this device last became a DVMRP neighbor to this router.
• Expire – The time remaining before this entry will be aged out.
• Capabilities – A hexadecimal value that indicates the neighbor’s capabilities.
Each time a probe message is received from a neighbor, the router compares the
capabilities bits with the previous version for that neighbor to check for changes in
neighbor capabilities. (Refer to DVMRP IETF Draft v3-10 section 3.2.1 for a
detailed description of these bits). These bits are described below:
- Leaf (bit 0) - Neighbor has only one interface with neighbors.
- Prune (bit 1) - Neighbor supports pruning.
- Generation ID (bit 2) - Neighbor sends its Generation ID in probe messages.
- Mtrace (bit 3) - Neighbor can handle multicast trace requests.
- SNMP (bit 4) - Neighbor is SNMP capable.
- Netmask - (bit 5) - Neighbor will accept network masks appended to the prune,
graft, and graft acknowledgement messages.
- Reserved (bit 6 and 7) - Reserved for future use.
Web – Click Routing Protocol, DVMRP, Neighbor Information.
Figure 3-148 DVMRP Neighbor Information
CLI – This example displays the only neighboring DVMRP router.
Console#show ip dvmrp neighbor 4-303
Address Interface Uptime Expire Capabilities
---------------- --------------- -------- -------- -------------
10.1.0.254 vlan1 79315 32 6
Console#