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cef adajacency table

Here is the show ip cef adj table, why I didn't see the entry?

r5#sh ip cef ad se0/0 de

IP CEF with switching (Table Version 12), flags=0x0

12 routes, 0 reresolve, 0 unresolved (0 old, 0 new)

15 leaves, 12 nodes, 14340 bytes, 15 inserts, 0 invalidations

0 load sharing elements, 0 bytes, 0 references

universal per-destination load sharing algorithm, id BB1AB9B8

2 CEF resets, 0 revisions of existing leaves

refcounts: 1065 leaf, 1055 node

Adjacency Table has 1 adjacency

I can see the routing entires if I show ip cef

r5#sh ip cef

Prefix Next Hop Interface receive Serial0/0 attached Serial0/0 receive receive receive attached Ethernet0/1 receive receive receive Serial0/0 Serial0/0

Cisco Employee

Re: cef adajacency table

This command doesn't work with point-to-point interfaces. My guess is that it is due to the fact that we don't keep the NH ip address in the adjacency entrie for a point-to-point interface.

IP Serial2/0 point2point(8)

0 packets, 0 bytes


CEF expires: 00:02:31

refresh: 00:00:31

Epoch: 0

IP Ethernet0/0

0 packets, 0 bytes


ARP 02:22:37

Epoch: 0

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600

Re: cef adajacency table

That's correct--there's no reason to. We always just send the packet out a point to point, without regard to the next hop IP address--it makes handling unnumbered interfaces simpler.