Cannot ping to self interface(UP, UP)

cm6043 · ‎09-28-2009

Hi all,

I have a strange issue in the router. I can ping to the remote PE ip(10.220.170.1) but can't ping local CE ip(10.220.170.2). Do anyone have similar case before ?

-------------------------

router#ping 10.220.170.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.220.170.2, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

novus-bkk-2237#ping 10.220.170.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.220.170.1, timeout is 2 seconds:

!!!!!

router#sh ip bgp su

BGP router identifier 172.16.255.197, local AS number 65505

BGP table version is 32, main routing table version 32

30 network entries using 3510 bytes of memory

31 path entries using 1612 bytes of memory

10/8 BGP path/bestpath attribute entries using 1240 bytes of memory

6 BGP AS-PATH entries using 144 bytes of memory

3 BGP extended community entries using 314 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

BGP using 6820 total bytes of memory

BGP activity 30/0 prefixes, 31/0 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

10.220.170.1 4 3491 19 10 32 0 0 00:05:36 27

router#

-----------------------------

Thanks

Leung Che man

Giuseppe Larosa · ‎09-28-2009

Hello Leung,

what type of interface is in use?

WAN interfaces when pinging their ip address send out the frame on wire.

for example ATM or serial interfaces.

Hope to help

Giuseppe

cm6043 · ‎09-28-2009

Hi Giuseppe,

It is a WIC-1T and router is C1841

Thanks

Leung

Giuseppe Larosa · ‎09-28-2009

Hello Leung,

as I've explained on serial lines the packet with SA=DA=interface address should be sent out on the wire.

For example in the case of FR multipoint subinterface you may need an additional frame-rel map statement to be able to ping successfully.

I see you have an eBGP session over it that looks like working

if you don't see other issues you should be fine.

Hope to help

Giuseppe

cm6043 · ‎09-28-2009

Hi Giuseppe,

Thanks for your information.

Leung