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New Contributor III

Disable multilink ppp when T1 down

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How can I disable routing over a multilink ppp interface when one of the t1 links is down?

This would be a simple matter with a track on the route, but "test if interface" does not support t1.

The application is a TA908e with MLPPP over T1 for voice and backup WAN on eth 0/1. I want to avoid using the MLPPP interface when one of the member links is down, since it may not have sufficient bandwidth for the expected number of calls.

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Honored Contributor
Honored Contributor

Re: Disable multilink ppp when T1 down

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Stumped! I don't see a practical way to do this. Bandwidth changes but no way to track it.

Open a feature request to add T1 interfaces to those that can be tracked.

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Honored Contributor
Honored Contributor

Re: Disable multilink ppp when T1 down

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Adtran has no configuration for the minimum number of links in an MLPPP bundle. Curiously, you can specify a maximum.

What's on the other end of the multilink PPP? If it's a Cisco, you can specify ppp multilink links minimum <number> on the Cisco side of the multilink interface. If a T-1 fails the line protocol will go down which will cause the TA908e to withdraw the route. 

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New Contributor III

Re: Disable multilink ppp when T1 down

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The other end is our provider. I still want the unit to be reachable via the ppp address, but not used as the default route.

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Honored Contributor
Honored Contributor

Re: Disable multilink ppp when T1 down

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Stumped! I don't see a practical way to do this. Bandwidth changes but no way to track it.

Open a feature request to add T1 interfaces to those that can be tracked.

View solution in original post

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New Contributor III

Re: Disable multilink ppp when T1 down

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Unfortunately, the TotalAccess 900e series is not one of the products open for submitting feature requests directly, and I don't have direct address to an Adtran sales representative.

Submitting a Feature Request

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New Contributor

Re: Disable multilink ppp when T1 down

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I will be out of the office and returning Friday February 24th. Please

call 207-326-2240 if you have an issue that needs immediate attention.

Thomas Lamontanaro

Network Support Specialist

207-326-2514

Maine Maritime Academy

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