From: Tony Medeiros (tonygreat@xxxxxxxx)
Date: Thu Sep 07 2000 - 01:35:28 GMT-3
The way I do snapshot is a little different than you technique. In my
dialer lists I make the routing protocols for the specific routed protocol
UNinteresting and allow every thing else. I deny RIP, SAP, IGRP, RTMP etc.
The dialing occurs because of the snapshot. You can see it if you do a
"debug dialer" It will say "dialer reason-snapshot. I also set the
Idle-timeout to exactly or slightly more than the snapshot active period.
That way the snapshot will finish it's active period before the idle-timeout
and not redial. IPX watchdog spoof and SPX spoof are also helpfull commands
on a low bandwidth ISDN link. That "protocol specific" part of the
"dialer map snapshot" command baffles me too. I think I just put a 0 or 1
in that field. LIke you, I could not find what it means it the Docs.
Take care
Tony Medeiros
CCIE 6172 (for 8 days)
----- Original Message -----
From: <smaljure@cibernetworks.com>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, September 06, 2000 11:22 AM
Subject: Snapshot routing ...
> Hi All
>
> I have the following topology
>
>
> E0--R5--Bri0-----Bri0--R6--E0
>
> I have snapshot routing working for IP RIP, IPX RIP, and AT RTMP (!!)
>
> The routes stay in the routing table till the quiet time expires, in my
case
> 15 minutes and the ISDN line stays down. Only if there is unicast traffic,
> the line comes up.
>
> Another interesting thing is that I set up a static SAP on R5 and observed
> if the ISDN line comes up because of the periodic IPX SAP's. I had a very
> broad dialer-list shown below and did not make an attempt to explicitly
deny
> IPX SAP's as interesting traffic.
>
> dialer-list 1 protocol ip permit
> dialer-list 1 protocol ipx permit
> dialer-list 1 protocol appletalk permit
>
> So both IPX RIP routes and the IPX SAP's are compliant with snapshot. The
> IPX SAP table also is "frozen" on R6 till the quiet time expires.
>
> So far so good.
>
> Now what I want to do is enable snapshot only for AT RTMP (say). i.e. I do
> not mind if IP RIP causes the line to come up every 30 seconds but I do
not
> want RTMP to cause dialing every 10 seconds. I know it sounds retarted but
> just for the heck of it.
>
> The issue is how do I bind the "dialer map snapshot..." command to a
single
> network layer protocol..
>
> There is some confusion on this...
>
> The IOS on the router gives the following help:
>
> R5(config-if)#dialer map snapshot ?
> N Protocol specific address
>
>
> where as the IOS command summary (for the same version) gives the
following
> help:
>
> dialer map snapshot sequence-number dial-string
> no dialer map snapshot [sequence-number]
>
> Syntax Description
>
> sequence-number
> A number in the range from 1 to 254, inclusive, that
> uniquely identifies a dialer map.
> dial-string
> Telephone number of a remote snapshot server to be called
> during an active period.
>
> I had always thought that the "sequence-number" is the correct
> interpretation. If so is there a way to do snapshot routing for only a
> single network layer protocol??
>
> Below is my config for R5 which is my snapshot client:
>
> Thank you
>
> interface BRI0
> ip address 16.0.0.5 255.255.255.252
> encapsulation ppp
> appletalk cable-range 200-205 200.5
> appletalk zone BRI
> ipx network 200
> isdn spid1 0835866101 8358661
> isdn spid2 0835866301 8358663
> no peer neighbor-route
> dialer idle-timeout 30
> dialer map snapshot 1 name R6 8358662
> dialer map appletalk 200.6 name R6 broadcast 8358662
> dialer map ipx 200.0006.0006.0006 name R6 broadcast 8358662
> dialer map ip 16.0.0.6 name R6 broadcast 8358662
> dialer-group 1
> snapshot client 5 15 suppress-statechange-update dialer
> ppp authentication chap
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:53 GMT-3