RE: ISDN Multilink PPP

From: Higgins, Andrew (Andrew.Higgins@xxxxxxxxxxxxxxxxxxx)
Date: Sun Jul 11 1999 - 16:40:48 GMT-3


   
I noticed that you don't have a dialer list statement. The dialer list is
what determines the interesting traffic.

interface Dialer0
  dialer list 1

dialer-list 1 protocol ip permit

Defines any ip traffic as interesting. To alleviate the whole issue, just
set your dialer idle-timeout to a high value. The default as you noticed
for the idle-timeout is 120 seconds.

Andrew

-----Original Message-----
From: Ben Rife [mailto:brife@bignet.net]
Sent: Sunday, July 11, 1999 3:20 PM
To: ccielab@groupstudy.com
Subject: ISDN Multilink PPP

Hi Guys, I'm 2 days away.....

    I have an issue I can't get past with Multilink PPP.

I am using a dialer profile on both routers. Their configs are identical as
follows:

interface BRI0
 no ip address
 isdn spid1 0835866101 8358661
 isdn spid2 0835866301 8358663
 dialer pool-member 1
!
interface Dialer0
 ip address 192.168.2.1 255.255.255.0
 encapsulation ppp
 dialer remote-name r2504
 dialer string 8358662
 dialer load-threshold 1 either
 dialer pool 1
 dialer-group 1
 ppp multilink

Interesting traffic will bring the first channel up, then one side or the
other will bring the other channel up. The problem is that my idle-timeouts
never match. They don't match with each other or with the remote side. So
what happens is that one channel will reach idle-timeout (120 sec) and drop
the connection. Then immediately the other side will bring it back up again.
It's got me perplexed. I can be sending pings across the line and the idle
time-out on one of the channels is updated but not both. And then the other
channel will go down and up...etc.

Here is a sh dialer snippet to show my point.

BRI0:1 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Interface bound to profile Dialer0
Time until disconnect 52 secs
Connected to 8358662

BRI0:2 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Dial reason: Dialing on overload
Interface bound to profile Dialer0
Time until disconnect 118 secs
Current call connected 00:01:05
Connected to 8358662

I've only got 2 days left....

Benjy Rife
MCSE, CNE, CCIE Candidate
brife@bignet.net <mailto:brife@bignet.net>
www.bignet.net/~brife <http://www.bignet.net/~brife>



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