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Webcast-Catalyst9k
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Help with Queuing

I have a dial up connection through the ISDN link from remote to branch site office. On remote site there is Cisco 3600 router (E1 link) and the branch office has Cisco 800 router (standard 2B ISDN). The connection is working well but when I try using any sort of queuing (Custom, Priority or WFQ) the problems arrive. For example if I configure WFQ on dialer interface on 800 an 3600 router. When I run sho interface bri 0 or sho interface dialer 1 on router 800 or sho interface dialer 1 on 3600 I can see that WFQ is configured. But when the connection is established and I run sho interface bri 0:0 or sho interface bri 0:1 (depends on channel the connection is using) I can see that the connection is using FIFO queueing strategy. The same happens with priority, and custom queuing and on 3600 router.

Has anyone ever experienced anything like that?

Is there a solution to my problem?

Thanks in advance.

Željan

3 REPLIES
Bronze

Re: Help with Queuing

On the dialer interface, do you have "no fair-queue" by chance?

~Zulfi

ovt Bronze
Bronze

Re: Help with Queuing

I'm not sure about all IOS releases, but at least 12.0 doesn't support WFQ on bri/dialer. Even if you configure it you get the message: "interface must be fifo queue, force fifo". Try to turn on debug and see is this happening.

Anonymous
N/A

Re: Help with Queuing

Tnx. I've checked the debug priority and debug isdn events, dialer and so on. First you are right about the message "interface must be fifo queue, fore fifo", but still I get output that router is placing packets in priority queues.

For example:

94: *Mar 2 07:15:40: PQ: Dialer1: ip (s=10.255.0.1, d=10.1.1.64) -> high

93: *Mar 2 07:15:38: PQ: Dialer1: ip (s=10.255.0.1, d=10.1.1.64) -> high

92: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

91: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

90: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

89: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

88: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

87: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

86: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

85: *Mar 2 07:15:38: PQ: Dialer1: ip (defaulting) -> normal

84: *Mar 2 07:15:37: PQ: Dialer1 output (Pk size/Q 36/0)

83: *Mar 2 07:15:37: PQ: Dialer1: ip (s=10.255.0.1, d=10.1.1.64) -> high

82: *Mar 2 07:15:37: PQ: Dialer1 output (Pk size/Q 64/0)

81: *Mar 2 07:15:37: PQ: Dialer1: ip (s=10.255.0.1, d=10.1.1.64) -> high

and still the interface shows FIFO queue.

Very frustrating.

Interesting thing is that the priority debug info can be seen on the 800 router that has BRI interface configured for outgoing traffic comming from the network behind him, but on the 3600 that has a PRI interface only when the traffic is originating from 3600.

Any guess why?

Tnx in advance.

Željan

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