Cisco Voice Guru

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Configuring RAS Retries and Timers

without comments

I am reading in the Cisco IOS H.323 Configuration guide this morning.  Yes, it’s exhilarating to read at 5:00am (NOT!).  Since I’m nodding off to sleep, I am writing another post to pass on the next bit of knowledge – configuring RAS retries and timers.

Normally, you would never need to touch this piece of H.323 gateways, but we’re not dealing with “normal,” real-world experience.  We’re dealing with the psychotic CCIE voice lab.  You need to know everything.

RAS Configuration Options

The ras timeout command configures the number of seconds for the gateway to wait before resending a RAS message to a gatekeeper.

The ras retry command configures the number of times to resend the RAS message after the timeout period expires.

The ras rrq ttl command configures the number of seconds that the gateway should be considered active by the gatekeeper. The gateway transmits this value in the RRQ message to the gatekeeper. The margin time keyword and argument allow the gateway to transmit an early RRQ to the gatekeeper before the time-to-live value advertised to the gatekeeper.

The default values for timeouts and retries are acceptable in most networks. You can use these commands if you are experiencing problems in RAS message transmission between gateways and gatekeepers.

RAS Configuration Example

voice service voip
ras timeout {all | arq | brq | drq | grq | rai | rrq} value
ras retry {all | arq | brq | drq | grq | rai | rrq} value
ras rrq ttl time-to-live [margin time]

Written by Matthew Berry

February 11th, 2010 at 5:46 am

Posted in Blog

Tagged with , , ,

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