[j-nsp] AE vs PT , and OSPF neigh not forming

Samol molasian at gmail.com
Thu Jan 23 00:58:26 EST 2014


Hi List,

I've got not another problem with ospf neigh. As the topo below, SRX and MX
can reach each other by ping, but ospf neig can't form.

MX (ae0.88)------------------(pt-1/0/0.0) SRX

I did the investigation on SRX and I found that SRX is sending/receiving
ospf hello message.

Time      Filter    Action Interface     Protocol        Src Addr
              Dest Addr
18:37:46  pfe       A      pt-1/0/0.0    OSPF            172.16.161.1
              224.0.0.5
18:37:44  OSPF-DEBUG A     local         OSPF            172.16.161.2
              224.0.0.5
18:37:38  pfe       A      pt-1/0/0.0    OSPF            172.16.161.1
              224.0.0.5
18:37:35  OSPF-DEBUG A     local         OSPF            172.16.161.2
              224.0.0.5
18:37:29  pfe       A      pt-1/0/0.0    OSPF            172.16.161.1
              224.0.0.5
18:37:26  OSPF-DEBUG A     local         OSPF            172.16.161.2
              224.0.0.5

However, on MX side, It's sending the hello message, but it's not receiving
hello message that SRX ACKs. that leads to OSPF state in INIT state on SRX
side, and no neigh status on MX side. Looking in to ae interface statistics
, get the result as below :

    Link:
      ge-1/0/0.88
        Input :             0          0             0            0
        Output:         62551          0       6804562            0
      ge-1/0/1.88
        Input :           882          0        287932            0
        Output:             0          0             0            0

it's using one link to send and another to receive. Surely, OSPF message
that sending from SRX is being dropped somewhere in the middle, however why
is it not dropping ICMP message ? Any idea is really appreciated.

Regards,



-- 
Samol Khoeurn
(855) 077 55 64 02 / (855) 067 41 88 66
Network Engineer
Cisco: CCNA/CCNP SP/CCIP/
Juniper: JNCIA/JNCIS-ENT,SP,SEC/JNCIP-ENT
www.linkedin.com/in/samolkhoeurn


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