From: Erick B. (erickbe@xxxxxxxxx)
Date: Thu Sep 07 2000 - 02:46:55 GMT-3
Hi,
I'm having problems getting RIPv1 or RIPv2 to work
with snapshot. I change just the routing protocol to
IGRP and it works as expected. Debug dialer shows the
reason is snapshot, etc. I remove the snapshot
commands and RIP updates go across the dialer
interface and both routers learn routes. Once I add
snapshot back and I wait for the active period to kick
in line (rebooted both routers) and issue debugs it
shows no updates going across the BRI and I can ping
the other routers Dialer interface. I don't get it,
and the docs on snapshot are very scarce. My idle
timeout matches my active time and I've also made it
slightly larger. I've tried it with dialer and on the
BRI interface with no difference using RIP. IGRP works
like a charm with same BRI/dialer interface config as
RIP.
debug dialer, debug snapshot, show dialer interface,
show snap, etc all look proper.
I don't know what that protocol # part of the map is
either and have looked multiple places. If I get RIP
working I am writing a how-to for myself.
Then again, ISDN/dialer interfaces work as expected
sometimes then other times will give you problems.
--- Tony Medeiros <tonygreat@home.com> wrote:
> 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
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