From: alsontra@hotmail.com
Date: Sun Mar 14 2004 - 16:46:04 GMT-3
Hi David,
As I understand this, the keyword Dynamic in the remote-peer statement
sets a inactivity timeout of 10mins, disables keepalives and assigns a
timeout value of 90 seconds - by default. (Karl Solie - (CCIE-Practical
Studies page 932)
The inactivity timers affects how long the dynamic peer is active on the
local router after the last circuit has disconnected and the timeout value
affects how long the tcp session is active. When you define interesting
traffic in your dialer-list your going to include tcp port 2065, because
this is the port DLSW uses for data and keepalives. However, your using the
keyword dynamic so there is no keepalive traffic and only data is defined as
interesting. Therefore, the ISDN link is never torn down based on missed
keepalives. (Solie,Karl p.923) In other words, the ISDN interface will only
come down if there is no data traffic on port 2065 or the timeout expires.
Given the default dynamic peer configuration - If there is no data on a
remote-peer connection for 90 sec (the default dynamic timeout value), the
ISDN line will come down in 90sec. If you want the ISDN line to come down
sooner, you'll have to manipulate the remote-peer timeout value (specified
in seconds).
What I state above does not take into consideration priority configurations,
which would define ports 2065,1981-83 as interesting traffic to the ISDN
interface.
As to your question regarding verifying configurations, I have no idea. My
only experience with DLSW is from a router perspective and what I've read.
Again, if there are DLSW experts on this list, I would love to hear your
opinions on this subject. What I state above is based on my reading and IE
lab config experience. Please correct me if I've gone astray.... :-)
Alsontra-
----- Original Message -----
From: "David Hurtado" <dei2viccie@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, March 10, 2004 8:26 AM
Subject: DLSW+ over ISDN
> Hello everybody,
>
> I have a couple of questions about DLSW over ISDN:
>
> 1.- When configuring DLSW over DDR, suppose that you use dynamic DLSW
> peering. In the "dlsw remote-peer tcp dynamic" you can define 2 timeouts:
>
> - "timeout" ( Resend time limit for TCP)
>
> - "inactivity" ( Configures the length of time a connection is idle before
> closing the dynamic remote peer connection)
>
> If you have to disconnect the ISDN if there has been no traffic sent
across
> the DLSw+ peering for more than one minute, which timeout should you use?
>
> I would choose the inactivity timeout, but in all the labs and examples i
> have seen, it's the other timeout the one choosen. Could somebody explain
me
> why, please?
>
> 2.- How can i take the dynamic peering relationship up (in order to test
the
> configuration)?
>
> 3.- If i use FST encapsulation instead of TCP encapsulation, which must be
> the dialer-list to only allow DLSw+ traffic?
>
>
> All the answers will be wellcome. Thanks for the help.
>
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