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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)S2
Conditions: This symptom is observed on a Cisco 12000 series when the MPLS VPN-VRF Selection
Based on Source IP Address feature is enabled in the configuration.
Workaround: Do not enable the MPLS VPN-VRF Selection Based on Source IP Address feature.
CSCsd28415
Symptoms: When only one T1 link in a MLP bundle is active while all other links are shut down,
the bundle does not pass traffic unless you bring up at least one more T1 link in the bundle.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(31)S2.
Workaround: Bring up a second T1 link in the MLP bundle.
CSCsd30704
Symptoms: When you first enter the router isis area-tag command followed by the address-family
ipv6 command and then change the administrative distance for the address-family IPv6
configuration, the RP may crash.
Conditions: This symptom is observed on a Cisco 12000 series that runs the gsr-p-mz image of
Cisco IOS Release 12.0(30)S5, Release 12.0(31)S3, or Release 12.0(32)S1. The symptom may also
occur on other platforms.
Workaround: There is no workaround.
CSCsd34318
Symptoms: The output of the show memory bigger command shows negative block sizes for 4 GB
of RAM.
Conditions: This symptom is observed on a Cisco 12000 series when a block with a size greater than
2 GB is also present.
Workaround: There is no workaround.
CSCsd34463
Symptoms: An Engine 4, Engine 4 plus, or Engine 6 line card may punt MPLS packets to the RP,
causing the CPU usage of the RP to be high.
Conditions: This symptom is observed on a Cisco 12000 series that receives a large number of small
MPLS packets that have their TTL set to 1.
Workaround: There is no workaround.
CSCsd35405
Symptoms: A line card that is configured with a multilink bundle may reset when the connected
serial T1 interface on the remote router is shut down while traffic is flowing.
Conditions: This symptom is observed on a Cisco 12000 series when the traffic that enters the
multilink bundle exits over an L2TPv3 tunnel and when multilink fragmentation is applied at the
remote end.
Workaround: Disable multilink fragmentation at the remote end. If this is not an option, there is no
workaround.
CSCsd36528
Symptoms: In an MVPN topology, an Engine 5-based SIP (that is, a SIP-401, SIP-501, SIP-600, or
SIP-601) in which one or more SPAs are installed may reset when you forward multicast traffic with
packets that are larger than the MTU of the interface and therefore require fragmentation.
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