Symptom
With enabled FRR for IPv6 packets are dropped with PARSE_DROP_EGR_MPLS_LABEL_INVALID reason.
MPLS HW entry has Unlabelled in PI CEF, but output label in hardware CEF entry
RP/0/RSP0/CPU0:RR#show mpls forwarding labels 34936 hardware egress location 0/0/cpu0
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
34936 Unlabelled 2001:xxx::/32 2001:yyy:1000::32 \
N/A
...
Primary TX H/W Result for NP:1 (Index: 0x684d (BE)):
Raw Data 0: 0x11040000 fefff223 b48cc600 00000000
Raw Data 1: 0xb402163c 3caa0000 00000000 00000000
...
labels:
output_label: 8547 exp: 6 eos: 0 <<<< issue is present
local_label: 248480 exp: 0 eos: 0
Conditions
FRR enabled for ipv6 unicast in IGP
