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EIGRP on Cat3750

For EIGRP equal path loadbalancing, when i do a traceroute from one switch to another, there are some kind of loop happen. is this normal when we configure equal path loadbalancing?

This is my setup:

172.16.168.1---------C1---172.16.78.2---------172.16.78.1---C2

C1---172.16.78.6---------172.16.78.5---C2

C2 Config:

router eigrp 7008

passive-interface default

no passive-interface FastEthernet1/0/23

no passive-interface FastEthernet1/0/24

network 172.16.78.0 0.0.0.3

network 172.16.78.4 0.0.0.3

no auto-summary

C1 Config:

router eigrp 7008

passive-interface default

no passive-interface FastEthernet1/0/23

no passive-interface FastEthernet1/0/24

network 172.16.78.0 0.0.0.3

network 172.16.78.4 0.0.0.3

network 172.16.168.0 0.0.0.255

no auto-summary

---------------------------------------------------------------------------------

C2 traceroute to C1:

Type escape sequence to abort.

Tracing the route to 172.16.168.1

1 172.16.78.6 0 msec

172.16.78.2 0 msec

172.16.78.6 0 msec

c2#traceroute 172.16.168.1

Type escape sequence to abort.

Tracing the route to 172.16.168.1

1 172.16.78.2 0 msec

172.16.78.6 0 msec

172.16.78.2 0 msec

1 REPLY
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Re: EIGRP on Cat3750

This isn't a loop, it's normal traceroute functioning, or it should be. This is the result of trace packets being sent through different available paths. Note that the source is the local router, and, AFAIK, all locally sourced packets are still "process switched," so per packet load sharing would be the norm in this situation, rather than per flow or source/destination pair.

:-)

Russ.W

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