04-02-2014 04:19 AM - edited 03-04-2019 10:42 PM
Hi All,
Topology : R1 --P2P(EIGRP)--- R2 ---MPLS(BGP)---R3
We had a strange issue yesterday, Null router was added in R1 router for below network
<<<ip route 10.25.1.100 255.255.255.255 null0>>
This null route got advertized to R2 and from R2 to R3 . we have EIGRP-BGP redistribution on R3.
Doubts :
1. why null router got advertized to R2 ,though there was no registribution configured on R1.
2. it might got advertized to R2 ,because we have network state 10.0.0.0/8 on R1. due to which it got advertize.. why ?
Please help me how it got advertized to R2.
Thanks
- Sri
04-02-2014 04:38 AM
Hello
You are correct about you assumption -
The host route to null and the advertised network are in the same subnet range, so this WILL be advertised to its eigrp peer of R2.
res
Paul
04-02-2014 04:43 AM
Hi Paul,
So "NULL" route got advertized ,because it matches with network statement...
can you please share the doc/link about NULL route , if you have.
Thanks
Sri
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