Specifications

1093
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S4
Conditions: This symptom is observed when the CPU use of the router temporarily increases to more
than 90 percent for several tens of seconds and when one or more high-priority processes are
frequently active but do not necessarily use many CPU cycles.
For example, high CPU use may occur when a peer router is reloaded or when an interface with
several hundreds of numbered IP subinterfaces comes up, which causes many processing changes
on the router because of the “Tagcon Addr” process.
On a Cisco 12000 series, high CPU use may occur because of the “Fabric ping” high-priority
process, which is frequently active.
Other high-priority processes may also cause the symptom to occur.
Workaround: To increase the length of the hello adjacency holdtimes, enter the mpls ldp discovery
hello holdtime command on the affected router. You may need to enter this command on all
platforms in the network in order to provide full protection.
• CSCeh97760
Symptoms: In the outputs of the show ip psa-cef and show ip cef commands for an Engine 2 ingress
line card, the “Local OutputQ (Unicast)” information may point to another and incorrect slot than
the slot that the global CEF table points to.
When this symptom occurs, packets that are destined for these specific IP address are dropped.
Conditions: This symptom is observed on a Cisco 12000 series when an Engine 2 line card is used
as an ingress line card for traffic that is directed to a default route.
Workaround: Enter the clear ip route 0.0.0.0 or clear ip route * command.
• CSCeh97829
Symptoms: An RP may crash continuously when you reload all the line cards in a dual-RP router
that has the redundancy mode is set to SSO.
Conditions: This symptom is observed on a Cisco 12000 series that is configured with two GRPs or
two PRPs that are configured for SSO and occurs only when a 1-port channelized OC-48 ISE line
card, a 4-port channelized OC-12 ISE line card, or 16-port channelized OC-3 ISE line card is present
in the router.
Workaround: Set the redundancy mode to RPR or RPR+.
• CSCei00027
Symptoms: On a channelized OC-48 ISE line card with APS configured, a “Signal Failure”
condition remains after the line card has been reloaded or after you enter the shutdown command
followed by the no shutdown command.
Conditions: This symptom is observed on a Cisco 12000 series and affects only a channelized
OC-48 ISE line card with an APS configuration.
Workaround: There is no workaround.
• CSCei04350
Symptoms: MVPN PIM neighbors that are associated with both a 1-port channelized OC-48 ISE line
card and a 1-port channelized OC-12 (DS1) ISE line card bounce when you perform a
microcode-reload of a 1-port channelized OC-12 (DS1) ISE line card.
Conditions: This symptom is observed on a Cisco 12000 series.
Workaround: There is no workaround.