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New Member

SNA over Frame

I have just fired up a new Frame circuit with AT&T (256k) between two offices on opposite sides of the country to run traffic (IP and SNA (for printing)). This is to replace a current circuit with another provider. We brought the circuit up to test it and the IP traffic was flowing nicely. The SNA traffic (for printing) would not respond however. We are using two 2501's to connect the two sites, with Paradyne CSU/DSU's. Is there anything in the config below that you can think would need tweaking? I just basically copied the config from serial 0 where the old line was to s1...so it should be the same and s0 with the old ISP was working great, even at a lower (128k) rate. Something about the SNA traffic, even though I know it's just encapsulated IP.

interface Serial1

ip address 32.100.100.1 255.255.255.128

encapsulation frame-relay

no ip route-cache

no ip mroute-cache

bandwidth 256

frame-relay interface-dlci 100

frame-relay lmi-type cisco

bridge-group 1

That's the config...it's the same on both sides of the wan...thanks for any thoughts!

5 REPLIES
New Member

Re: SNA over Frame

Greetings:

Use sub-interfaces and you should be fine. Bridge maps do not build dynamically as IP ones do. A "show frame map" will confirm if the bridge map is there.

Thanks...Steve

New Member

Re: SNA over Frame

Thanks Steve! A quick "rookie" question for you...can you briefly explain the purpose of a sub-interface?

New Member

Re: SNA over Frame

Never mind...I read enough on them now to know what they are and why they are used.

New Member

Re: SNA over Frame

One other thing Steve - do I need subinterfaces on both sides?

New Member

Re: SNA over Frame

Why are you bridging across the WAN, why no use DLSw? Then it is all IP, you don't have to worry about spanning-tree or any bridged traffic.

Just a thought

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