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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(32)S9
Workaround: There is no workaround.
• CSCsk30567
Symptoms: A GSR with Eng5 line cards may not pass traffic when acting as an ASBR in an inter-as
vpn option B setup. The problem happens after the removal of a VRF from the ASBR. The mpls
labels advertised on the eBGP peering for the vpnv4 prefixes are not programmed in the line cards
so traffic is dropped. The label for a prefix can be seen on the RP, but not on the LCs.
Conditions: When there are lots of prefixes in BGP. Seen with PRP2 with Eng5 line cards.
Workaround: Flapping the affected prefix triggers an update which gets the labels on the LCs.
• CSCsk35283
Symptoms: Following error occurs:
%EE48-3-ALPHA_MCAST: Can’t assign new hw_mdb
Conditions: Observed on E3-choc12 Line card with multicast-egress-qos enabled. At least 8 OIF for
a VRF mroute on the same LC.
Workaround: Spread the VRF interface distribution so that none of the LC contain more then 7
interfaces.
Further Problem Description: Best known way to recover is through reload of the LC.
• CSCsk49685
Symptoms: In an FRR setup, VPNv4 packets are black-holed around 4-5 seconds while the traffic
switched over to the backup TE-Tunnel.
Conditions: Problem is seen with Cisco IOS Release 12.0(32)SY4 for VPNv4 traffic ingress to GSR
Engine-2 line card.
Workaround: There is no workaround.
Further Problem Description:
Engine-2 linecard incorrectly sets the tunnel label for tunnel-end when the traffic is forwarded to the
back-up tunnel. MPLS packets arrives at the tunnel-end with 0 TTL hence they are discarded.
• CSCsk53104
Symptoms: RSP is not reused the IDB. When the maximum 2047 IDB is reached after delete and
add a channel-group several times, the RSP did not assign the old IDB because is on non-share reuse
mode and log the follow messages.
Cisco7507_test#sh idb ifnum
Interface Deleted IfIndex Feature
Se0/0/0:1 36 non-shared reuse,
Se0/0/0:1 21
Se0/0/1:3 37 non-shared reuse,
Se0/0/1:3 22
Se0/0/1:5 38 non-shared reuse,
Se0/0/1:5 23
Se0/0/1:6 39 non-shared reuse,
Se0/0/1:6 24
Se0/0/6:21 227 non-shared reuse,
Se0/0/6:21 69
Se0/0/6:21.16 70
Se0/0/6:28 600 non-shared reuse,
Se0/0/6:28 67
Se0/0/6:28.16 68
RSP logged the follow messages:
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Cisco7507_test(config-controller)#controller E1 6/0/6
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