Tagging Connected Routes - EIGRP

[GRANT3779]

Hi All,

I have as an example, the following -

router eigrp 100
 
 network 172.27.18.1 0.0.0.0
 network 172.27.19.1 0.0.0.0
 network 172.27.20.1 0.0.0.0

 network 172.27.50.1 0.0.0.0
 network 172.27.51.1 0.0.0.0
 redistribute static metric 1544 100 254 1 1500 route-map STATIC-TO-EIGRP

My route-map advertises my statics which have a certain TAG number. I also want to be able to tag my directly connected Interfaces (network statements) and also any other routes I am learning via EIGRP dynamically. How can I tag all routes with a tag when they exit one of my EIGRP Interfaces? Distribute list out?

[Rolf Fischer · Accepted solution]

Hi,

distribute-list out should work, but bear in mind that the maximum value for internal route tags is limited to 255 (1-byte protocol field).

HTH

Rolf

[Peter Paluch · Accepted solution]

Hi Rolf,

bear in mind that the maximum value for internal route tags is limited to 255

This is absolutely true for EIGRP with Classic Metrics. If the show eigrp plugins shows the eigrp-release to be at least 8.00.00 then the router supports Wide Metrics as well, and with those, it should be able to tag routes with 32 bit tags.

Best regards,
Peter

[GRANT3779]

Thanks a lot guys. Interesting note about the tag sizing also.

Cheers

[Rolf Fischer]

Thanks Peter,

I've seen that recent IOS support the eigrp default-route-tag command to set tags for internal routes easily and that the internal tags now have a 4 byte field, but I didn't know that the increased tag field came with the Wide Metrics enhancements.

Best regards,

Rolf