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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)S11
Workaround: “test rsp stall” cleans up the Rx-Side buffered packets. Hence this could be considered
a workaround. However, this does not always help. Doing a soft OIR removal and insertion of the
LC always helps recover from this situation. The best workaround is to apply a service policy.
• CSCuk61422
Symptoms: CEF-switching does not function, and the output of the show adjacency interface-type
interface-number detail command does not show any packets.
Conditions: This symptom is observed on a Cisco 7500 series that has an RSP when packets are
switched to a multilink interface via CEF and when you enter the show adjacency interface-type
interface-number detail command for a multilink interface.
Workaround: There is no workaround.
Resolved Caveats—Cisco IOS Release 12.0(32)S11
Cisco IOS Release 12.0(32)S11 is a rebuild of Cisco IOS Release 12.0(32)S. The caveats listed in this
section are resolved in Cisco IOS Release 12.0(32)S11 but may be open in previous Cisco IOS releases.
This section describes only severity 1, severity 2, and select severity 3 caveats.
• CSCee73956
Symptoms: The Generalized TTL Security Mechanism (GTSM), formerly known as BGP TTL
Security Hack (BTSH), checks the time-to-live (TTL) value of the packets at the application level,
which is not efficient. Also, GTSM does not stop the establishment of a TCP connection for a packet
with an invalid TTL value.
Conditions: This symptom is observed on a Cisco platform that has the neighbor neighbor-address
security ttl hops hop-count command configured in a BGP environment.
Workaround: There is no workaround.
• CSCef70161
Symptoms: External BGP neighbors that are configured in the IPv4 VRF address-family context
may fall into different update groups, even if the outbound policy is identical. This situation slightly
reduces the overall scalability because BGP cannot use update replication when sending updates to
the neighbors.
Conditions: This symptom is observed on a Cisco router and is both release- and
platform-independent.
Workaround: There is no workaround.
Further Problem Description: The symptom does not affect neighbors that are configured in the
global IPv4 address-family context.
• CSCeg25475
Symptoms: Filtering BGP routes by means of the distribute-list prefix MARTIAN in command
applied to address-family IPv4 actually filters out M-BGP routes in address-family VPNv4.
Conditions: This symptom occurs when MPLS-VPNs are configured.
Workaround: Use route maps to filter routes inbound.
Further Problem Description: The show ip /jointfilesconvert/415844/bgp neighbors command can be used to check whether
the prefixes are actually being filtered out from updates for address-family VPNv4, and not for IPv4,
as it is configured.
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