12-16-2004 01:37 PM - edited 03-02-2019 08:38 PM
I tried to configure VPI/VCI 1/888 on my IMA circuit and router didn't like it. The highest VPI/VCI it will let me configure is 1/255. I was wondering if there was any limitations on that. If anyone has any ideas, I would appreciate it. Thanks
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12-16-2004 07:01 PM
Hi,
I'm not sure what platform you are attempting this on but on quite a few platforms, the total amount of bit-space available for VPI+VCI on the SAR chip is limited to a number less than what the ATM standards state.
On most of the IOS-based platforms, you can configure higher VCI values by sacrificing the VPI range. The command usually used to do this is: 'atm vc-per-vp' or something similar.
For example, on certain platforms, the max amount of bits available for VPI+VCI is 14 bits. So you could, for example, use 4 bits for VPI (0-15) and 10 bits for VCI (0-1023).
Hope that helps,
Paresh.
12-17-2004 07:57 AM
Try using the command
atm vc-per-vp 1023
This will allow you a lower amount of VPI's (1-15) that in turn will grant you a higher number of VCI's.
12-16-2004 07:01 PM
Hi,
I'm not sure what platform you are attempting this on but on quite a few platforms, the total amount of bit-space available for VPI+VCI on the SAR chip is limited to a number less than what the ATM standards state.
On most of the IOS-based platforms, you can configure higher VCI values by sacrificing the VPI range. The command usually used to do this is: 'atm vc-per-vp' or something similar.
For example, on certain platforms, the max amount of bits available for VPI+VCI is 14 bits. So you could, for example, use 4 bits for VPI (0-15) and 10 bits for VCI (0-1023).
Hope that helps,
Paresh.
12-17-2004 06:01 AM
This is on Cisco 3745 router running IOS 12.2(15)T14
12-17-2004 07:57 AM
Try using the command
atm vc-per-vp 1023
This will allow you a lower amount of VPI's (1-15) that in turn will grant you a higher number of VCI's.
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