PM3A-2E: Von Jacobsen Header compression between pm3, cisco and ascend (fwd)

MegaZone (megazone@livingston.com)
Sun, 15 Dec 1996 20:35:53 -0800 (PST)

Once upon a time Livingston Portmaster List - AAA-Internetservice shaped the electrons to say...
>The PM3 and Cisco 2503 or Ascend P50 Router can not commit the VJ compression.
>"Protocol: PPP Options: Quiet, Compression"

>Do I need any special settings for pm3 / cisco 2503i / ascend p50 ?

Nothing special on te PM-3. However, if this is going to be a multilink
connection it is strongly advised not to use VJ compression.

This doesn't make sense. Is it out of order? IPCP wouldn't start until
LCP was open - so why is LCP following IPCP?

>Sending IPCP_CONFIGURE_REQUEST to port S1 of 16 bytes containing:
>01 01 00 10 02 06 00 2d 0f 00 03 06 c2 40 2e 46

We ask for VJ.

>Received IPCP_CONFIGURE_REQUEST on port S1 of 6 bytes containing:
>01 69 00 0a 03 06 c2 a3 3b fe

They do not ask for it.

>Sending IPCP_CONFIGURE_ACK to port S1 of 10 bytes containing:
>02 69 00 0a 03 06 c2 a3 3b fe

We ACK them.

>Received IPCP_CONFIGURE_REJECT on port S1 of 6 bytes containing:
>04 01 00 0a 02 06 00 2d 0f 00

They NAK VJ

>Sending IPCP_CONFIGURE_REQUEST to port S1 of 14 bytes containing:
>01 02 00 0e 02 04 00 2d 03 06 c2 40 2e 46

We send again, apparently with no data segment.

>Received IPCP_CONFIGURE_REJECT on port S1 of 4 bytes containing:
>04 02 00 08 02 04 00 2d

they NAK.

>Sending IPCP_CONFIGURE_REQUEST to port S1 of 10 bytes containing:
>01 03 00 0a 03 06 c2 40 2e 46

We request just the IP, no VJ

>Received IPCP_CONFIGURE_ACK on port S1 of 6 bytes containing:
>02 03 00 0a 03 06 c2 40 2e 46

They finally accept.

The Cisco is rejecting VJ header compression.

-MZ

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