Chapter 2 Using the Passport 8683POS Module 33
Negotiating network layer protocols
PPPuses various network control protocols to determine the values of parameters during network layer negotiations, which is the final phase of PPP initialization. Similar to the LCP, each network control protocol allows the devices to negotiate various network options over the data link by transmitting
Networks options include which network addresses to use and which media types to bridge. Once both devices agree upon networks options, the network control protocol reaches the open state. The devices then begin transmitting user data packets for
Spanning tree group feature
The BPDU (Bridge Protocol Data Unit) format specified in RFC 1638 is enabled by default on the Passport 8683POS Module. If support for multiple spanning tree groups is required, the BPDU default format must first be disabled. For information on changing the STG format, see “config pos ppp” on page 95.
