Segment Routing Global Block
Segment Routing Global Block (SRGB) is the range of labels reserved for segment routing. SRGB is local
property of an segment routing node. In MPLS, architecture, SRGB is the set of local labels reserved for
global segments. In segment routing, each node can be configured with a different SRGB value and hence
the absolute SID value associated to an IGP Prefix Segment can change from node to node.
The SRGB default value is 16000 to 23999. The SRGB can be configured as follows:
Router(config)# router isis 1
Router(config-isis)#segment-routing global-block 45000 55000
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
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L2VPN Services over Segment Routing for Traffic Engineering Policy
Segment Routing Global Block
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