Specifications

1071
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S6
Conditions: This symptom is observed when you reload a Cisco router that functions as a PE router
and that is configured for MVPN.
Workaround: There is no workaround.
• CSCei35132
Symptoms: When a link failure occurs between two provider (P) routers, the LSP that is protected
via Fast Reroute (FRR) for a primary tunnel and the directed LDP session within the tunnel are
fast-rerouted onto an assigned backup tunnel. However, when the backup tunnel goes down, VPN
prefixes that are protected by backup TE LSP entries in the LFIB become “Untagged.” This situation
causes packet loss for AToM and L3VPN traffic that uses the link between the P routers as its
primary path.
Conditions: These symptoms are observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(31)S, that functions as a P router, and that is connected to another P router via a 4-port
OC-3 ISE line card.
The topology is as follows:
PE ------ P --- OC-3 --- P ------ PE
There are one-hop primary tunnels between every pair of routers that is listed above, and each link
is protected by an NHOP backup tunnel LSP.
The symptom occurs when you pull the TX fiber cable from the 4-port OC-3 ISE line card that forms
the protected link between the two P routers, when the protected LSP is fast-rerouted onto the
backup tunnel, and when the backup tunnel is torn down. One P router may show “Untagged” entries
in its LFIB, especially for a loopback interface to a provider edge (PE) router. This situation breaks
the forwarding for all of the L2 and L3 VPNs that depend on that PE router.
The symptom is timing-dependent. The symptom does not occur all the time and does not seem to
be Cisco 12000 series line card-dependent, nor is it specific to a link between the two P router
because the symptom may also occur when you pull the TX fiber cable of a line card that forms the
link between a PE router and a P router.
Workaround: There is no workaround.
• CSCei38116
Symptoms: ISE line cards crash when a Cisco 12000 series receives 640,000 multicast streams.
Conditions: This symptom is observed when the memory of the ISE line cards becomes exhausted
when the thousands of multicast streams are received.
Workaround: There is no workaround.
• CSCei41469
Symptoms: The standby PRP crashes when you apply an IPv6 ACL on an interface of an ISE line
card.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with redundant
PRPs.
Workaround: There is no workaround.
• CSCei48972
Symptoms: After a manual switchover occurs in RPR+ mode, a VPN that is configured on a Frame
Relay subinterface fails to recover and CEF may be disabled on line cards.
Conditions: This symptom is observed on a Cisco 12000 series that runs the gsr-p-mz image of a
Cisco IOS interim release for Release 12.0(30)S2.
Workaround: Enter the hw-module slot slot-number reload command.