
471
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Workaround: Use the clear mac-address-table dynamic command on the RP.
• CSCtf50894
Symptoms: During the collection process an interrupt is raised by a higher priority event (topology
change, i.e.: a tunnel shutdown). If the tunnel shutdown occurs at a very precise time before the
collection is complete, data structures used by FRR collection end up being deleted/altered by the
higher priority event. When the suspended FRR statistics collection process resumes, it ends up
working with data that has become stale/trashed. This results in a crash.
Conditions: The symptom is observed on an MPLS TE FRR enabled router that will trigger periodic
collection of accounting information for all prefixes using a given TE tunnel as its next-hop. This
process is invoked in 10 second intervals and it can be suspended by other higher priority processes
before its runtime completion.
Workaround: Disable FRR protection.
• CSCtf51332
Symptoms: An interface with PBR/VRF select configuration punts all traffic to the RP and causes
high CPU usage. When MLS rate-limiter is configured, there might be packet losses at higher rate
of traffic.
Conditions: When a PBR/VRF-select route-map is removed from the first interface on which the
PBR/VRF select was configured, the internal RSVD VLAN is removed. This causes the packets
from all interfaces with this route-map to be punted to the RP.
Workaround 1: Disable VPN-CAM lookup.
Workaround 2: Configure identical route-maps with different names, for example:
route-map sak-vrfs-in1 permit 10
match ip address SAK-PAM-SOURCES
set vrf sak-pam
!
route-map sak-vrfs-in1 permit 20
match ip address SAK-VOIP-SOURCES
set vrf sak-voip
!
route-map sak-vrfs-in2 permit 10
match ip address SAK-PAM-SOURCES
set vrf sak-pam
!
route-map sak-vrfs-in2 permit 20
match ip address SAK-VOIP-SOURCES
set vrf sak-voip
!
Apply these route-maps on to the interfaces which will carry identical VRF select configurations.
interface GigabitEthernet2/3.104
description SAK/PAM Turku C-FI-20709-8416
encapsulation dot1Q 104
ip vrf receive sak-pam
ip vrf receive sak-voip
ip address 10.100.220.177 255.255.255.252
no ip redirects
no ip proxy-arp
ip policy route-map sak-vrfs-in1
arp timeout 300
!
interface GigabitEthernet2/3.505
description SAK/PAM Turku C-FI-20709-8416
encapsulation dot1Q 505
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