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.
I know some LAN switching devices, in a default "QoS" configuration, would treat ports as "diffserv" untrusted ports, or access ports, meaning, the DSCP (a reuse of the TOS also) in packets inbound at that port are not to be trusted. Have you looked at your switches documentation ?
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
_______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
