Cisco CRS Configuration Guide

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You must be in a user group associated with a task group that includes the proper task IDs. The command
reference guides include the task IDs required for each command. If you suspect user group assignment
is preventing you from using a command, contact your AAA administrator for assistance.
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Router that runs Cisco IOS XR software.
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Installation of the Cisco IOS XR software mini-image on the router.
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Installation of the Cisco IOS XR MPLS software package on the router.
Restrictions for Implementing GMPLS UNI
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The total number of configured GMPLS UNI controllers should not exceed the platform scale limit of
500 GMPLS interfaces.
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Each UNI-N (ingress or egress) should be routable from its adjacent UNI-C. The UNI-C nodes need to
be routable from the UNI-N nodes too.
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GMPLS UNI is supported only over DWDM controllers and so, over POS and GigabitEthernet interfaces.
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GMPLS UNI is supported only with these Cisco CRS Line Cards:
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Cisco CRS-1 OC768 (C/L-band) DWDM PLIM
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Cisco CRS-1 OC768 DPSK (C/L-band) STD CHAN PLIM
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Cisco CRS-1 4 port 10GE (C/L-band) DWDM PLIM
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Cisco CRS 1-Port 100GE CP-DQSPK Full C-Band Tunable DWDM Interface Module
Information About Implementing GMPLS UNI
To implement GMPLS UNI, you should understand these concepts:
GMPLS UNI vs GMPLS NNI
In case of GMPLS NNI, the optical network topology is known and path calculations are performed at the
NNI head. In case of GMPLS UNI, the optical network topology is unknown to the UNI-C nodes and path
calculations are performed by the UNI-N nodes.
GMPLS LSP Signaling
The GMPLS overlay model architecture is used for LSP signaling for GMPLS connections. In GMPLS UNI,
UNI-C nodes send a request for a connection to UNI-N node. The connection request does not contain an
end-to-end path. This is because, as mentioned previously, UNI-C nodes do not have knowledge of the topology
of the optical network and therefore cannot determine the end-to-end path. The UNI-C node signals a connection
request without an ERO.
The LSP diversity is signalled on a GMPLS UNI tunnel with a path-option. A path-option is permitted on a
GMPLS UNI tunnel with a "no ERO" and an optional "XRO" attribute sets to specify LSP diversity
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
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Implementing GMPLS UNI
Restrictions for Implementing GMPLS UNI

Cisco CRS Specifications

General

Operating System	Cisco IOS XR
Product Type	Core Router
Form Factor	Modular Chassis
Dimensions	Varies by chassis type
Weight	Varies by chassis type
Architecture	Distributed
Switch Fabric	Multi-stage
Interface Support	Ethernet, SONET/SDH, OTN
Interfaces/Ports	Varies by line card
Port Density	Varies by line card
Routing Protocol	BGP, IS-IS, OSPF, MPLS
Management	CLI, SNMP
Power Supply	Redundant, hot-swappable
Cooling	Redundant, Hot-swappable Fan Trays
Supported Protocols	IPv4, IPv6, MPLS
Management Interfaces	Ethernet, console
Security Features	ACLs