Method and system for terminating SONET/SDH circuits in an IP network
A method and system for terminating SONET/SDH circuits in an IP network includes a SONET/SDH to Ethernet inter-working device/functionality implemented in a network element for mapping SONET/SDH channels into logical channels over an Ethernet connection. The SONET/SDH channels are de-encapsulated to remove Layer- 2 protocols and expose IP packets. The IP packets are encapsulated with Ethernet headers and logical tags for transmission over the Ethernet connection to their final destinations via a Provider Edge (IP) router.
1 . A method for terminating SONET/SDH circuits in an IP network to deliver IP packets, comprising:
providing a Gateway having a network element for receiving the SONET/SDH circuits and an IP router for routing the IP packets to their final destinations;
providing an Ethernet interface between the network element and the IP router; and
translating and bridging the IP packets received at the network element from the SONET/SDH access circuits onto the Ethernet interface.
2 . A method as in claim 1 , wherein the step of translating and bridging the IP packets onto the Ethernet interface further comprises:
de-encapsulating SONET/SDH channels received at the network element to remove any Layer-2 protocol and expose the IP packets; and
mapping the SONET/SDH channels into logical channels over the Ethernet interface.
3 . A method as in claim 2 , wherein the step of mapping the SONET/SDH channels into logical channels further comprises encapsulating the IP packets with Ethernet headers and logical tags.
4 . A method as in claim 3 , wherein the logical tags are IEEE 802.1q VLAN tags.
5 . A method as in claim 1 , wherein the network element is a Multi-Service Provisioning Platform (MSPP).
6 . A method as in claim 1 , wherein the network element is a digital cross connect device.
7 . A system for terminating SONET/SDH circuits in an IP network to deliver IP packets, comprising:
a Gateway having a network element for receiving the SONET/SDH circuits and an IP router for routing the IP packets to their final destinations;
an Ethernet interface in communication with the network element and the IP router;
wherein the network element is operative to receive, translate and bridge the SONET/SDH access circuits onto the Ethernet interface.
8 . A system as in claim 7 , wherein the network element functions to translate and bridge the SONET/SDH access circuits onto the Ethernet interface by (a) de-encapsulating SONET channels received at the network element to remove any Layer-2 protocol and expose the IP packets; (b) map the SONET/SDH channels into logical channels.
9 . A system as in claim 8 , wherein the network element maps the SONET/SDH channels into logical channels by encapsulating the IP packets with Ethernet headers and logical tags.
10 . A system as in claim 9 , wherein the logical tags are IEEE 802.1q VLAN tags.
11 . A system as in claim 7 , wherein the network element is an add/drop multiplexer.
12 . A system as in claim 7 , wherein the network element is a MSPP.
13 . For use in an IP network, a SONET/SDH to Ethernet inter-working device, comprising:
means for receiving SONET/SDH channels;
means for de-encapsulating the SONET/SDH channels to remove any Layer-2 protocol and expose IP packets; and
means for mapping the SONET/SDH channels into logical channels over an Ethernet connection for receipt by an router.
14 . An inter-working device as in claim 13 , wherein the router is an IP router.
15 . An inter-working device as in claim 13 , wherein the router is an MPLS router.
16 . An inter-working device as in claim 13 , wherein the mapping means further comprises means for encapsulating the IP packets with Ethernet headers and logical tags.
17 . An inter-working device as in claim 16 , wherein the logical tags are IEEE 802.1q VLAN tags.