02-08-2012 12:52 AM - edited 03-07-2019 04:47 AM
guys,
i have one router, 2 cat 6509 and 2 nexus 7010 running on multiaccess network. The router or cat 6509 unable to form neighbotship with nexus. it just stucked at exchange process. I have tried without authentication, ospf priority, int wont help. I also tried putting the ospf mtu-ginore at all devices. this command also did not help.
However if i shut down the vlan/interface on both nexus, the router can establish neighborship with cat6509. below is the debug on the router.
anyone come across this problem?
eb 8 08:14:10.693: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.255.253 aid:0.0.12.50 chk:23D9 aut:0 auk: from Port-channel2.1
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Neighbor change event
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: DR/BDR election
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Elect BDR 136.186.255.253
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Elect DR 136.186.255.254
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: DR: 136.186.255.254 (Id) BDR: 136.186.255.253 (Id)
Feb 8 08:14:12.449: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.2.201 aid:0.0.12.50 chk:13E2 aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 PAK : rcv. v:2 t:4 l:56 rid:136.186.255.254 aid:0.0.12.50 chk:AB93 aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:14:12.637: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.254 seq 0x27A2F59F opt 0x52 flag 0x2 len 1252
eb 8 08:14:10.693: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.255.253 aid:0.0.12.50 chk:23D9 aut:0 auk: from Port-channel2.1
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Neighbor change event
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: DR/BDR election
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Elect BDR 136.186.255.253
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: Elect DR 136.186.255.254
Feb 8 08:14:10.693: OSPF-64653 ADJ Po2.1: DR: 136.186.255.254 (Id) BDR: 136.186.255.253 (Id)
Feb 8 08:14:12.449: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.2.201 aid:0.0.12.50 chk:13E2 aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 PAK : rcv. v:2 t:4 l:56 rid:136.186.255.254 aid:0.0.12.50 chk:AB93 aut:0 auk: from Port-channel2.1
Feb 8 08:14:12.637: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:14:12.637: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.254 seq 0x27A2F59F opt 0x52 flag 0x2 len 1252
02-08-2012 12:57 AM
another debug
eb 8 08:10:45.558: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.253 seq 0x5006AF23 opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:45.558: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.253 seq 0x5006AF23 opt 0x52 flag 0x2 len 1252
Feb 8 08:10:46.070: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:10:46.070: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:46.070: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.254 seq 0x27A2F59F opt 0x52 flag 0x2 len 1252
Feb 8 08:10:47.534: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.2.200 aid:0.0.12.50 chk:13E2 aut:0 auk: from Port-channel2.1
Feb 8 08:10:50.694: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.253 aid:0.0.12.50 chk:21E6 aut:0 auk: from Port-channel2.1
Feb 8 08:10:50.694: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.253 seq 0x5006AF23 opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:50.694: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.253 seq 0x5006AF23 opt 0x52 flag 0x2 len 1252
Feb 8 08:10:51.174: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.255.253 aid:0.0.12.50 chk:23E2 aut:0 auk: from Port-channel2.1
Feb 8 08:10:51.822: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:10:51.822: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
eb 8 08:10:45.558: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.253 seq 0x5006AF23 opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:45.558: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.253 seq 0x5006AF23 opt 0x52 flag 0x2 len 1252
Feb 8 08:10:46.070: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:10:46.070: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:46.070: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.254 seq 0x27A2F59F opt 0x52 flag 0x2 len 1252
Feb 8 08:10:47.534: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.2.200 aid:0.0.12.50 chk:13E2 aut:0 auk: from Port-channel2.1
Feb 8 08:10:50.694: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.253 aid:0.0.12.50 chk:21E6 aut:0 auk: from Port-channel2.1
Feb 8 08:10:50.694: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.253 seq 0x5006AF23 opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
Feb 8 08:10:50.694: OSPF-64653 ADJ Po2.1: Send DBD to 136.186.255.253 seq 0x5006AF23 opt 0x52 flag 0x2 len 1252
Feb 8 08:10:51.174: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.255.253 aid:0.0.12.50 chk:23E2 aut:0 auk: from Port-channel2.1
Feb 8 08:10:51.822: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.254 aid:0.0.12.50 chk:3CD aut:0 auk: from Port-channel2.1
Feb 8 08:10:51.822: OSPF-64653 ADJ Po2.1: Rcv DBD from 136.186.255.254 seq 0x27A2F59F opt 0x42 flag 0x7 len 32 mtu 1500 state EXCHANGE
02-08-2012 01:14 AM
I don't know what subnetting are you using, but you have an ip addressing problem from what I see.
Feb 8 08:10:47.534: OSPF-64653 PAK : rcv. v:2 t:1 l:60 rid:136.186.2.200 aid:0.0.12.50 chk:13E2 aut:0 auk: from Port-channel2.1
Feb 8 08:10:50.694: OSPF-64653 PAK : rcv. v:2 t:2 l:32 rid:136.186.255.253 aid:0.0.12.50 chk:21E6 aut:0 auk: from Port-channel2.1
Eugen
02-08-2012 01:17 AM
Sorry , all the devices are in same subnet having diferent router -id.
02-08-2012 01:23 AM
I see, you must have configured router-id yourself.
Sorry I can't see nothing else on this output.
Eugen
02-08-2012 03:46 AM
Please could you paste the topology digram and also the relevant configuration from the boxes.
Cheers,
-amit singh
02-23-2012 10:35 PM
foudn the problem. the nexus has the loop prevention logic which does not allow traffic to traverse destine to a vPC member port.
" when external devices attempt to form a routing adjacency with the Nexus 7000′s over the vPC peer-link, some traffic destined for a vPC member port can be forced over the peer-link even when the network is healthy, causing traffic to be dropped by the loop prevention logic"
need to exclude the vlan from propagting via vpn domain.
command peer-gateway exclude vlann x.x.x.
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