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Cisco Bug: CSCtb65574 - PBTS:Labeled traffic not going via default class, but via class0 tunnel

Last Modified

Jan 08, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

3.6.0.LC 3.7.0.LC 3.8.0.LC 3.8.3.BASE 3.9.0.LC

Description (partial)


With PBTS configured on a CRS-1 router traffic maybe forwarded to the incorrect path if the bottom label EXP bits are different from the IPv4 precedence bits.

This problem only occurs when MPLS traffic is received and MPLS labels are popped with the underlying IPv4 traffic then forwarded into a new MPLS tunnel and the MPLS EXP bits of the popped label is different than the IPv4 precedence bits.
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