Supported Hardware Features; Supported Cisco Ios Features - Cisco 7604 Configuration Manual
Ios software configuration guide
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Chapter 24
Configuring PFC3BXL and PFC3B Mode Multiprotocol Label Switching
Supported Hardware Features
The following hardware features are supported:
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Supported Cisco IOS Features
The following Cisco IOS software features are supported in PFC3BXL or PFC3B mode:
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OL-4266-08
Label operation— Any number of labels can be pushed or popped, although for best results, up to
three labels can be pushed, and up to two labels can be popped in the same operation.
IP to MPLS path—IP packets can be received and sent to the MPLS path.
MPLS to IP path—Labeled packets can be received and sent to the IP path.
MPLS to MPLS path—Labeled packets can be received and sent to the label path.
MPLS Traffic Engineering (MPLS TE)—Enables an MPLS backbone to replicate and expand the
traffic engineering capabilities of Layer 2 ATM and Frame Relay networks.
Time to live (TTL) operation—At the ingress edge of the MPLS network, the TTL value in the MPLS
frame header can be received from either the TTL field of the IP packet header or the user-configured
value from the adjacency entry. At the egress of the MPLS network, the final TTL equals the minimum
(label TTL and IP TTL)-1.
With the Uniform mode, the TTL is taken from the IP TTL; with the Pipe mode, a value of
Note
255, taken from the hardware register, is used for the outgoing label.
QoS—Information on Differentiated Services (DiffServ) and ToS from IP packets can be mapped to
MPLS EXP field.
MPLS/VPN Support—Up to 1024 VRFs can be supported (over 511 VRFs requires recirculation).
Ethernet over MPLS—The Ethernet frame can be encapsulated at the ingress to the MPLS domain and
the Ethernet frame can be decapsulated at the egress.
Packet recirculation—The PFC3BXL or PFC3B provides the capability to recirculate the packets.
See the
"Recirculation" section on page
Configuration of MPLS switching is supported on VLAN interfaces with the mpls ip command.
Multi-VPN Routing and Forwarding (VRF) for CE Routers (VRF Lite) is supported with the
Note
following features: IPv4 forwarding between VRFs interfaces, IPv4 ACLs, and IPv4 HSRP.
IPv4 multicast is not supported.
Multi-VRF for CE Routers (VRF Lite)—VRF-lite is a feature that enables a service provider to
support two or more VPNs (using only VRF-based IPv4), where IP addresses can be overlapped
among the VPNs. See this publication:
http://www.cisco.com/en/US/products/hw/routers/ps259/prod_bulletin09186a00800921d7.html.
MPLS on Cisco routers—This feature provides basic MPLS support for imposing and removing
labels on IP packets at label edge routers (LERs) and switching labels at label switch routers (LSRs).
See this publication:
http://www.cisco.com/en/US/docs/ios/12_0st/12_0st21/feature/guide/fs_rtr.html.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
PFC3BXL and PFC3B Mode MPLS Label Switching
24-4.
24-5
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