Guys, Not the brightest tool in the box when it comes to CEF, but I have a couple of questions about the output below :-
How do you determined which next-hop a packet is switched too? (I assume look at the exact-match command), but how does the algorithm work?
Also, if you look below on the switch, it does not look very load-balanced to me? Any ideas?
Also, a question (if you look below the multiple =============), there is further output for the CEF exact-match command, and the router has a different next-hop to the switch? Is this correct? What do I use, the switch i would assume?
On the router
MR01>sh ip route 155.195.94.0
Routing entry for 155.195.94.0/24
Known via "eigrp 69", distance 170, metric 281856
Tag 64700, type external
Redistributing via eigrp 1, eigrp 2
Advertised by eigrp 66 route-map 69out
Last update from 155.195.44.86 on Vlan451, 1d03h ago
Routing Descriptor Blocks:
155.195.44.89, from 155.195.44.89, 1d03h ago, via Vlan451
Route metric is 281856, traffic share count is 1
Total delay is 1010 microseconds, minimum bandwidth is 10000 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
* 155.195.44.86, from 155.195.44.86, 1d03h ago, via Vlan451
Route metric is 281856, traffic share count is 1
Total delay is 1010 microseconds, minimum bandwidth is 10000 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
MR01>
MR01>sh ip cef 155.195.94.0
155.195.94.0/24, version 22645, per-destination sharing
0 packets, 0 bytes
via 155.195.44.89, Vlan451, 0 dependencies
traffic share 1
next hop 155.195.44.89, Vlan451
valid adjacency
via 155.195.44.86, Vlan451, 0 dependencies
traffic share 1
next hop 155.195.44.86, Vlan451
valid adjacency
0 packets, 0 bytes switched through the prefix
MR01>
On the switch
MX01 (enable) sh mls entry cef ip 155.195.94.0/24 ad
Mod: 15
Destination-IP: 155.195.94.0 Destination-Mask: 255.255.255.0
FIB-Type: resolved
AdjType NextHop-IP NextHop-Mac Vlan Encp Tx-Packets Tx-Octets
-------- --------------- ----------------- ---- ---- ------------ -------------
connect 155.195.44.89 00-0d-65-9d-19-c0 451 ARPA 2209 123704
connect 155.195.44.86 00-11-20-7d-71-e0 451 ARPA 7727929 6016777591
MX01 (enable)
==============================================================================
CEF exact-match confusion :- Is this normal?
MR01>sh ip cef exact-route 50.254.42.55 155.195.188.38
50.254.42.55 -> 155.195.188.38 : Vlan451 (next hop 155.195.44.89)
MR01>
MX01 (enable) sh mls cef exact-route 50.254.52.55 155.195.188.38
Next Hop: 155.195.44.86 Vlan: 451, Destination Mac: 00:11:20:7d:71:e0
MX01 (enable)
Many thx indeed,
Ken
