From: Michael Wong (Michael.Wong@xxxxxxxxxx)
Date: Sun Sep 02 2001 - 22:15:00 GMT-3
Be careful here. I haven't actually done what you've shown but I'm sure it will
cause some issues. 2 Dial peers to a single destination is bound to cause some
problems when the router decides to use the dial peer. My gut tells me that it
will use the 1st dial peer configured and won't even look at the second one ..
. not 100% sure though.
If I understand you correctly, you have got 2 paths (subnets) to the 1 destinat
ion number. Precedence values do not tell the router which dial peer to use, it
is used to determine which traffic should be forwarded first when using a queu
ing mechanism such as WFQ or LLQ. The precedence command under the dial-peer ba
sically flags the packets from the dial-peer as whatever precedence value set,
to allow the queuing mechanism to act on it.
In an implementation such as this, I would have one dial peer pointing to the e
nd destination, and then alter the routing protocol to determine which is your
preferred path. Maybe modify metrics or use policy routing.
Good luck, let me know how you go ......
MW :)
-----Original Message-----
From: Nicholas Jaksec [mailto:jaksec@lucent.com]
Sent: Monday, 3 September 2001 9:31 am
To: CCIE
Subject: VOI P Question
Can the "IP Precedence" command determine which Dial Peer statement has
higher priority to call the same phone #, example:
"R1" has two IP subnets in its routing table (10.1.1.0 & 11.1.1.0) to reach
the same Phone # "3002" on "R2" but I only want traffic to use the one
subnet (10.1.1.2) at all times. Can IP Precedence do this by making the
values different, if so which value (5 or 6) has the higher priority. I am
not sure if higher values have the higher priority or the lower values.
"R1"
dial-peer voice 1 voip
destination-pattern 3002
session target ipv4:10.1.1.2
ip precedence 5
!
dial-peer voice 2 voip
destination-pattern 3002
session target ipv4:11.1.1.2
ip precedence 6
"R2"
dial-peer voice 1 pots
destination-pattern 3002
port 1/0/0
********************************************
Nicholas R. Jaksec, CCNP, CCDP, MCSE+I, CNA
Network Systems Engineer
Lucent Worldwide Services
One North Shore Center
12 Federal St. Suite 420
Pittsburgh, Pa 15212
Office: 412-330-6336 Fax: 412-323-7665
Pager: 1-800-467-1467
Email: jaksec@lucent.com
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