X.25 VC

Unanswered Question
Mar 11th, 2009
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I'm starting to get confused with this now. Can anyone who's familiar with X25 advice pls


Once a Virtual Channel (VC) is up, can i safely assume that i can have a maximum of 256 sessions per VC?


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Paolo Bevilacqua Wed, 03/11/2009 - 20:46
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What do you mean by "session" ? A VC is like a point-to-point link, you can carry any type and amount of IP traffic on it.

echelon360 Wed, 03/11/2009 - 21:06
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Maybe i should rephrase this. A VC is established when a call/signal is requested. Hence, what's the maximum no of VCs that can be made? Is this 256?

Paolo Bevilacqua Wed, 03/11/2009 - 21:15
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Per standard, the maximum number of VCs (combined switched and permanent) is 4095, and cisco supports up to that number as well.

echelon360 Wed, 03/11/2009 - 21:27
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On a NM-16A/S, if i were to configure all ports for synchronous x25 connectivity. How many VCs can a single port hold?

Paolo Bevilacqua Wed, 03/11/2009 - 21:32
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As mentioned above, 4095.

Note in real world, more than few VCs per port are seldom used.

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