Hi Abhie,
The Cisco IOS does not allow the configuration of the Magic Number. It also does not support the Short Sequence Number header.
However, it does support the configuration of the endpoint discriminator. You can use the following command to accomplish this:
ppp multilink endpoint {hostname | ip ip-address | mac lan-interface | none |
phone telephone-number | string char-string}
The options above correspond to the options in section 5.1.3 of RFC1990.
By default, PPP uses the same string for the endpoint discriminator that it would provide for authentication to negotiate use of MLP with the peer. If authentication is not configured, it will use the hostname.
Hope that helps - pls rate the post if it does.
Regards,
Paresh.