[Asterisk-Users] QOS / Cisco / Asterisk

[Matt Schulte]

We're trying to PQ (Priority Queue) packets on a Cisco using ACL's. What
we're trying to avoid is hardcoding the IP address in the ACL. We were
trying to match by TOS set by Asterisk however it seems we've run into a
snag where the packet TOS tends to get reset somewhere on our network.
Has anyone had this issue? We're running Cisco everywhere inbetween
(even the switches). Is there an alternative way to match these? We've
thought of by port but that's kind of ad-hoc IMHO.

Asterisk1 --> 3560 --> 2600 -- (T1) --> 7500 --> 2900 --> 3550 -->
Asterisk2 

Sniff: (note the dumps between the 2 machines are diff times however
they show the same occurance)

Asterisk1: 1.1.1.1
09:09:10.019191 IP (tos 0x10, ttl  64, id 58, offset 0, flags [DF],
proto 17, length: 60) 1.1.1.1.12056 > 1.1.1.2.19726: [no cksum] UDP,
length 32
09:09:10.030146 IP (tos 0x0, ttl  62, id 63, offset 0, flags [DF], proto
17, length: 60) 1.1.1.2.19726 > 1.1.1.1.12056: [no cksum] UDP, length 32

Asterisk2: Dump on 206.80.70.55
09:34:34.418386 IP (tos 0x0, ttl  62, id 261, offset 0, flags [DF],
proto 17, length: 60) 1.1.1.1.14796 > 1.1.1.2.18996: [no cksum] UDP,
length 32
09:34:34.422974 IP (tos 0x10, ttl  64, id 273, offset 0, flags [DF],
proto 17, length: 60) 1.1.1.2.18996 > 1.1.1.1.14796: [no cksum] UDP,
length 32