From: Shawn Yang (syang@bitfone.com)
Date: Fri Aug 01 2003 - 14:59:58 GMT-3
Hi, John and Yu,
Thanks for getting back to me. I understand the map/inarp issue,
but my point is when you ping, should IOS first check if the
destination is one of it's own addresses, and if it is, there
should be a "shortcut" somewhere in the code. The ping should
not even get to the bottom of the protocol stack. So Frame mapping
should never be an issue here.
And, why does not the same happen on ATM/ISDN, but only for FR.
Sounds like a bug on FR code for me, at least something that can
be optimized. It makes us have to type one more command.
Shawn
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
yu chunyan
Sent: Thursday, July 31, 2003 3:04 PM
To: syang@bitfone.com; ccielab@groupstudy.com
Subject: Re: frame map ip: self address?
Hi,
In multipoint interface, if you donot define a map pointing to self ip
address, frame relay donot know which dlci to send the icmp, and will show
"encapsulation failure". In point-to-point interface, There is only one dlci
over there, frame relay just send the icmp over it. so, even you ping self
ip address, the icmp packet is send to the other end, which will send
response back.
Bin.
>From: "Shawn Yang" <syang@bitfone.com>
>Reply-To: "Shawn Yang" <syang@bitfone.com>
>To: <ccielab@groupstudy.com>
>Subject: frame map ip: self address? Date: Thu, 31 Jul 2003 12:50:24 -0700
>
>Hi, all,
>
>On FR interfaces, we need to map not only the "connected" ip address,
>but also the self ip address, is it right? What's the reason for
>that? I have found that if you don't do that you won't even able to ping
>your own interface.
>
>and this is true only for multipoint interfaces, but not point-to-point.
>
>Thanks for any info!
>
>Shawn
>
>
>
>
>R1 (s0) ------- R2
>
>On R1:
>int s 0
>ip addr 1.1.1.1
>frame map ip 1.1.1.1 102 <---------- without this, you won't able to ping
>1.1.1.1
>frame map ip 2.2.2.2 102 broadcast
>
>
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