Alcatel-Lucent 7450 - Figure 30: Shared Risk Link Groups; SRLG Penalty Weights for Detour and Bypass Lsps

MPLS and RSVP
7450 ESS MPLS Guide Page 137
Figure 30: Shared Risk Link Groups
This feature is supported on OSPF and IS-IS interfaces on which RSVP is enabled.
SRLG Penalty Weights for Detour and Bypass LSPs
The likelihood of paths with links sharing SRLG values with a primary path being used by a
bypass or detour LSP can be configured if a penalty weight is specified for the link. The higher the
penalty weight, the less desirable it is to use the link with a given SRLG.
Figure 31 illustrates the operation of SRLG penalty weights.
SRLG 1
SRLG 2
Primary Path (FRR, node protection)
Bypass tunnel taking SRLG into account
Secondary path taking SRLG into account
Fig_33