Re: Frame-Relay self ping on PPP

Hey Joe
This is great.
Could you explain why self ping works using mlpppofr as opposed to pppofr?
Is there some logical reason for it?
Also, could you also explain the ip numbered lo0 serial solution? Pinging
your own ip is no problem with this, but pinging the other end of the link
results in...issues.

In my scenario:

lo0 --- R3 s0/0.34 ---------------s0/0.43 R4 --- lo0

R3
int s0/0.34 p
ip unnumbered lo0
frame int 304
int lo0
ip add 10.1.34.3 255.255.255.0

R4
int s0/0.43 p
ip unnumbered lo0
frame int 403
int lo0
ip add 10.1.34.4 255.255.255.0

R3 can self ping but cannot ping R4, as 10.1.34.4 points to lo0...

R3#ping 10.1.34.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.34.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R3#ping 10.1.34.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.34.4, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

R3#sh ip ro 10.1.34.4
Routing entry for 10.1.34.0/24
  Known via "connected", distance 0, metric 0 (connected, via interface)
  Routing Descriptor Blocks:
  * directly connected, via Loopback0
      Route metric is 0, traffic share count is 1

Could you show how you managed to get around this?

Cheers man.

2009/8/24 Joe Astorino <jastorino_at_ipexpert.com>

> You need either ppp multilink over frame or setup ip unnumbered and point
> it to a loopback
>
>
> ------Original Message------
> From: Sameer Khurana
> Sender: nobody_at_groupstudy.com
> To: CCIE Groupstudy
> ReplyTo: Sameer Khurana
> Subject: Frame-Relay self ping on PPP
> Sent: Aug 23, 2009 10:55 PM
>
> Hi Group,
>
> If there is a P2P serial connections, for example:
>
> R1:
> ===
> S1:
> en fr
> no fram inv
> !
> int S1.1 po
> fram interface-dlci 102 ppp virtual-tem 1
> !
> int virtual-tem 1
> ip add 1.1.1.1 255.255.255.0
>
>
> R2:
> ===
> S1:
> en fr
> no fram inv
> !
> int S1.1 po
> fram interface-dlci 201 ppp virtual-tem 1
> !
> int virtual-tem 1
> ip add 1.1.1.2 255.255.255.0
>
> If we have to do self ping our own serial interfaces then what we need to
> do? Means... R1 should ping its own 1.1.1.1 and R2 should ping 1.1.1.2.
>
> Thanks,
> Sameer
>
>
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> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
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-- 
Regards
Roy
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