Cisco Cisco IOS Software Release 12.2(33)SRE
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MPLS Traffic Engineering—DiffServ Aware
(DS-TE)
(DS-TE)
This guide presents extensions made to Multiprotocol Label Switching Traffic Engineering (MPLS TE)
that make it DiffServ aware. Specifically, the bandwidth reservable on each link for constraint-based
routing (CBR) purposes can now be managed through at least two bandwidth pools: a global pool (also
called BC0) and a sub-pool (also called BC1). The sub-pool can be limited to a smaller portion of the
link bandwidth. Tunnels using the sub-pool bandwidth can then be used in conjunction with MPLS
Quality of Service (QoS) mechanisms to deliver guaranteed bandwidth services end-to-end across the
network.
that make it DiffServ aware. Specifically, the bandwidth reservable on each link for constraint-based
routing (CBR) purposes can now be managed through at least two bandwidth pools: a global pool (also
called BC0) and a sub-pool (also called BC1). The sub-pool can be limited to a smaller portion of the
link bandwidth. Tunnels using the sub-pool bandwidth can then be used in conjunction with MPLS
Quality of Service (QoS) mechanisms to deliver guaranteed bandwidth services end-to-end across the
network.
Beginning with Cisco IOS Release 12.2(33)SRB, DS-TE has been augmented to conform to IETF
standards that were developed after the initial creation of Cisco DS-TE. Now both the traditional and the
IETF versions of DS-TE can be run on your network; the new releases are backwards compatible.
standards that were developed after the initial creation of Cisco DS-TE. Now both the traditional and the
IETF versions of DS-TE can be run on your network; the new releases are backwards compatible.
Feature History
Release
Modification
12.0(11) ST
DS-TE feature introduced.
12.0(14) ST
Support was added for Cisco Series 7500(VIP) platform.
Support was added for IS-IS Interior Gateway Protocol.
12.0(14) ST-1
Support was added for guaranteed bandwidth service directed to many destination
prefixes (for example, guaranteed bandwidth service destined to an autonomous
system or to a BGP community).
prefixes (for example, guaranteed bandwidth service destined to an autonomous
system or to a BGP community).
12.0(22)S
Feature was implemented in Cisco IOS Release 12.0(22)S.
12.2(14)S
Feature was integrated into Cisco IOS Release 12.2(14)S.
12.2(18)S
Feature was implemented in Cisco IOS Release 12.2(18)S.
12.2(18)SXD
Feature was implemented in Cisco IOS Release 12.2(18)SXD.
12.2(28)SB
Feature was implemented in Cisco IOS Release 12.2(28)SB.
12.2(33)SRB
Feature was augmented to include the new IETF-Standard functionality of DS-TE,
as described in RFCs 3270, 4124, 4125, and 4127.
as described in RFCs 3270, 4124, 4125, and 4127.