The Ping Every Interface Requirement with BRI Interfaces

From: Michael Snyder (msnyder@xxxxxxx)
Date: Mon Aug 13 2001 - 15:34:30 GMT-3


   
I've noticed that even when I have an ISDN connection active, and I can pass
traffic over the link, I have a problem.

I only can ping the far(remote) end ip and not the near(local) end ip.

In other words, If the BRI0 interface is 10.252.32.2 and the remote end is
10.252.32.1, I only can ping 10.252.32.2 with the connection up.

Also with the connection down, and with the bri0 is spoofing, local pings
still don't work to 10.252.32.2. Guess they don't mean layer three spoofing.

Any ideas? Continued at bottom of page.

HeadEnd_1#show int bri 0
BRI0 is up, line protocol is up (spoofing)

HeadEnd_1#ping 10.252.32.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.252.32.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
HeadEnd_1#

interface BRI0
 ip address 10.252.32.1 255.255.255.0
 encapsulation ppp
 dialer idle-timeout 300
 dialer map ip 10.252.32.2 name HeadEnd_2 5552000
 dialer-group 1
 isdn switch-type basic-5ess
 isdn spid1 27055510001111 5551000
 isdn spid2 27055510011111 5551001
 ppp authentication chap
 ppp multilink
!

dialer-list 1 protocol ip permit

Just to muddy the waters some more, I've notice the same behaviors with GRE
tunnels. With a tunnel up & up, completely functional, still can't ping the
near interface, but can ping the far end interface.

Am I missing something? Or am I just screwed if the lab me asks to ping every
interface including the near ends of BRI interfaces or GRE tunnels?
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