Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Packet-over-SONET - basic questions

Q1. Am I understanding the concept correctly? The IP packet is encpsulated by PPP and the frame makes up the entire SPE. In otherwords, there are no virtual circuits channilized within the SPE?

Q2. What devices (MSPP ?) other than routers would have a PoS interface.

Q3. What type of topologies and/or scenarios would you use PoS?

2 REPLIES
Bronze

Re: Packet-over-SONET - basic questions

Yes, you are correct. IP packet is encpsulated by PPP and the frame makes up the entire SPE.

Hall of Fame Super Silver

Re: Packet-over-SONET - basic questions

In repsonse to Q2, yes the 15454 MSPP's have a POS interface internal to their ML100 and ML1000 cards. They can be an efficient way to integrate some Ethernet circuits onto a multiservice backbone. A full set of features is available as the cards actually run IOS. One also realizes the SONET layer 50 ms switching protection for Ethernet circuits.

See http://www.cisco.com/univercd/cc/td/doc/product/ong/15400/r70docs/r70ether/index.htm

254
Views
4
Helpful
2
Replies
CreatePlease to create content