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CCIE

SoO and EIGRP

29/12/10 19:39

Eigrp SoO can be quite difficult to understand, a great INE post HERE can explain some concepts.

Here's a summary for self-reference:

- set SoO extended community on PE routers interfaces towards CE


route-map SOO
set extcomm soo 100:1
inte f0/0
ip vrf sitemap SOO


- verify in EIGRP topology:


R2#sh ip eigrp topology 3.3.3.3/32
IP-EIGRP (AS 10): Topology entry for 3.3.3.3/32
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 409600
Routing Descriptor Blocks:
10.0.23.3 (FastEthernet0/1), from 10.0.23.3, Send flag is 0x0
Composite metric is (409600/128256), Route is Internal
Vector metric:
Minimum bandwidth is 10000 Kbit
Total delay is 6000 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
10.0.25.5 (FastEthernet0/0), from 10.0.25.5, Send flag is 0x0
Composite metric is (435200/409600), Route is Internal
Vector metric:
Minimum bandwidth is 10000 Kbit
Total delay is 7000 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 2
Extended Community: SoO:4:4


- If required apply the sitemap on CE to CE link (can cause issues, check the post)