
706
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Further problem description: When IPv6 prefix delegation assigns a prefix for Virtual Access
interface, it creates a static route for the prefix in the routing table. When a client moves to a new
interface, old binding and the old routes are retained, which causes the problem.
• CSCsk95969
Symptom: A HA router in SSO mode with both IPv6 unicast and IPv6 multicast configurations may
crash while configuring IPv6.
Conditions: The symptoms is observed on an HA router in SSO mode with both IPv6 unicast and
IPv6 multicast configurations, when both configurations are removed completely and then
configured again.
Workaround: There is no workaround.
• CSCsk96581
Symptoms: After loading a router for the first time or performing a switchover with a large number
of BGP neighbors configured, some neighbors may send hold timer expired notifications before
reaching established state.
Conditions: The problem is seen on routers with highly scaled configurations with many BGP
neighbors with low hold timers configured. Typically, the problem is most likely to be seen after a
switchover happens when all interfaces on the new active RP come up at approximately the same
time. The sudden burst of sessions attempting to establish at the same time can cause some of the
sessions to fail to be serviced in time to satisfy aggressive hold timers. Established sessions are not
vulnerable to this issue; only sessions in progress to established state can experience the problem.
Workaround: BGP neighbors can be brought up in smaller groups rather than all at once to distribute
the session establishment load so that no session in progress to established state will exceed their
configured hold timers.
• CSCsk98507
Symptoms: Router crashes after IPX routing is enabled.
Conditions: Problem happens only if an interface which has IPX network configuration is deleted
after disabling IPX routing.
Workaround: There is no workaround.
• CSCsk98751
Symptoms: A router may crash after the command mpls traffic-eng backup-path tunnel is issued.
Conditions: The symptom is observed when a backup tunnel is configured on PLR, which is a mid
point router for a protected primary tunnel.
Workaround: There is no workaround.
• CSCsl01595
Symptoms: Crash seen on Sup720 and RSP720 upon creating port-channel using range command.
Crash not seen on Sup32.
Condition: This problem will happen if a deleted port-channel interface on a Cisco 7600 is recreated
through interface range command.
Workaround: There is no workaround. As a solution, disabled creation of port-channel through
interface range on the Cisco 7600.
• CSCsl02649
Symptoms: PVC goes to INACTIVE state on standby after performing a shut/no shut.
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