Hello all,
Please excuse my disorganized posting/question, as this is my first
posting to the mailing list.
Currently I am attempting to implement two ASR1002-X routers on my
network edge, each with diverse eBGP provider connections receiving full
routes. Everything up to a point has gone very well, including reception
of full routes, blocking of default routes, local prefs, etc. However I
am getting some odd results when iBGP connecting the two together.
I appears that certain routes from each other are being filtered out, so
each router is in some cases aware of both routes to a prefix and in
some cases aware of only one. Examples:
edge01.las.telna.com#show ip bgp
...
*> 1.2.128.0/19 216.115.65.69 80 0 23005 701
38040 9737 i
* i 10.110.5.21 0 80 0 22911
22822 38040 9737 i
* i 1.2.128.0/18 10.110.5.21 0 80 0 22911
22822 38040 9737 i
*> 216.115.65.69 80 0 23005
701 38040 9737 i
* i 1.2.128.0/17 10.110.5.21 0 80 0 22911
22822 38040 9737 i
*> 216.115.65.69 80 0 23005
19151 38040 9737 i
*>i 1.2.160.0/19 10.110.5.21 0 80 0 22911
22822 38040 9737 i
* 216.115.65.69 80 0 23005
19151 10026 38040 9737 i
*>i 1.2.179.0/24 10.110.5.21 0 80 0 22911
22822 38040 9737 9737 23969 i
*>i 1.2.180.0/24 10.110.5.21 0 80 0 22911
22822 38040 9737 9737 23969 i
*>i 1.2.183.0/24 10.110.5.21 0 80 0 22911
22822 38040 9737 9737 23969 i
*>i 1.2.192.0/19 10.110.5.21 0 80 0 22911
22822 38040 9737 i
*>i 1.2.192.0/18 10.110.5.21 0 80 0 22911
22822 38040 9737 i
*>i 1.2.224.0/19 10.110.5.21 0 80 0 22911
22822 38040 9737 i
* i 1.3.0.0/24 10.110.5.21 0 80 0 22911
174 10026 18046 i
edge02.las.telna.com#show ip bgp
*> 1.0.128.0/19 199.189.118.149 80 0 22911
22822 38040 9737 i
* i 1.0.128.0/18 10.110.5.11 0 80 0 23005
3356 38040 9737 i
*> 199.189.118.149 80 0 22911
22822 38040 9737 i
* i 1.0.128.0/17 10.110.5.11 0 80 0 23005
19151 38040 9737 9737 i
*> 199.189.118.149 80 0 22911
22822 38040 9737 9737 i
* i 1.0.129.0/24 10.110.5.11 0 80 0 23005
19151 38040 9737 9737 9737 23969 i
*> 199.189.118.149 80 0 22911
174 38040 9737 9737 9737 23969 i
*> 1.0.160.0/19 199.189.118.149 80 0 22911
22822 38040 9737 i
What I don't completely understand is why, when the two ASRs are in a
iBGP relationship, some routes are showing on one unit and not the
other. Additionally, routes like 1.2.128.0/19 will show both paths on
one and not on the other.
edge01 show ip bgp neigh: http://pastebin.com/uv37gsmm
edge02 show ip bgp neigh: http://pastebin.com/Q9SiK1ZZ
edge01 bgp config: http://pastebin.com/rLRDTbDj
edge02 bgp config: http://pastebin.com/apsPLt3D
Any help would be highly appreciated!
--David Deutsch
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