cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Community Helping Community

62
Views
0
Helpful
0
Replies
Highlighted
Beginner

Cannot ping OC3 SPA based Serial INT from router itself, but can ping from other devices/PC. ARP table is not populating correctly on same local router.

Hardware is ASR 1002 series routers with an OC3 SPA installed and channelized into STS/VTG groups.

 

1-port Channelized OC3/STM1 to DS0 Shared Port Adapter

 

controller SONET 0/2/0
 framing sonet
 clock source internal
 !
 sts-1 1
  mode vt-15
  vtg 1 t1 1 description Testing123
  vtg 1 t1 1 channel-group 0 timeslots 1-24
  vtg 1 t1 2 channel-group 0 timeslots 1-24
  vtg 1 t1 3 channel-group 0 timeslots 1-24
  etc
  vtg 7 t1 4 channel-group 0 timeslots 1-24

 

 

Can you offer an explanation as to why some local interfaces on the ASR are not pingable from the local device/host but are pingable from other devices?

 

 

ASR Distro 1 cannot ping a serial interface that is local to itself/ASR Distro 1, but ASR Distro 3 can ping that same interface that is on Distro 1, as can my desktop and laptop PCs.

 

ASR Distro 1:

Serial0/2/0.2/5/4:0    1.1.141.73   YES manual up                    up 

 

Distro1#ping 1.1.141.73

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 1.1.141.73, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

 

 

 

 

Above ASR Distro 1 cannot ping its own interface Serial0/2/0.2/5/4:0 but pinging from Distro 3, a device not hosting Serial0/2/0.2/5/4:0 can ping Serial0/2/0.2/5/4:0.  Below:

 

 

 

Distro3#ping 1.1.141.73

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 1.1.141.73, timeout is 2 seconds:

!!!!!

 

 

Furthermore, local interfaces that are not pingable also do NOT populate the ARP table.

 

Thoughts?

 

Everyone's tags (1)
CreatePlease to create content
Content for Community-Ad
FusionCharts will render here