Specifications

1180
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S1
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(26)S or an earlier 12.0 S release.
Workaround: There is no workaround other than excluding the access to the MIB.
• CSCee76995
Symptoms: A packet becomes corrupted when you ping a POS line card.
Conditions: This symptom is observed on a Cisco 12000 series Engine 0 4-port OC-3 POS line card.
It only affects IOS 12.0(28.3)S.
Workaround: There is no workaround.
• CSCee77227
Symptoms: When a channel group is removed and readded to the controller, and then a PRE
switchover occurs, the PPP line protocol on the readded channel goes down after a while.
Conditions: This symptom is observed on a Cisco 10000 series that is configured with 24-port
channelized E1/T1 line cards.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the affected interface.
• CSCee77328
Symptoms: The PXF forwarding engine on a Cisco 10720 may crash after the microcode is reloaded
either through a manual reload by entering the microcode reload pxf command or after a previous
PXF crash. This situation causes multiple PXF crashes.
Conditions: This symptom is observed on a Cisco 10720 that runs Cisco IOS Release 12.0(26)S or
a later 12.0 S release, all of which contain IPv6 PXF packet forwarding functionality, and is most
likely to occur while IPv6 packets are passing through the router.
Workaround: Disable IPv6 functionality or disable PXF by entering the no service pxf command.
• CSCee78118
Symptoms: A line card or port adapter may crash on an MPLS VPN PE router when the
customer-facing interfaces are flapped.
Conditions: This symptom is observed when any of the following conditions are present:
– eBGP is used as the routing protocol between the PE and CE router, the CE router has the
redistribute connected command enabled in the BGP configuration, and there are multiple
eBGP sessions between the PE and CE router.
– The connected route for the link between the CE and PE router is learned from another PE router
via MP-iBGP. For example, the CE router may be dual-homed and may advertise the connected
routes to both PE routers.
The symptom affects routers that perform MPLS forwarding using ASICs such as some
Cisco 7200 series routers, the Cisco 7304, the Cisco 10000 series, the Cisco 12000 series, and the
Cisco RPM-XF. (This list may not be exhaustive.)
Workaround: Avoid the above-mentioned conditions. For example, avoid the redistribute
connected command in the BGP configuration of the CE router.
• CSCee78567
Symptoms: A temporary counter condition in which you see very large MPLS TE tunnel counter
spikes may occur on a Cisco 12000 series. This situation is observed via the SNMP variable
IfHCOutOctets (the total number of octets transmitted), via the SNMP variable locIfOutBitsSec (the
Cisco 5-minute decaying average), and in the output of the show interfaces tunnel number
privileged EXEC command (observe the elevated output rate).