Specifications
1213
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S
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CSCdu45201:
Symptoms: When the encapsulation ppp interface configuration command is configured on
Cisco 12000 series Packet-over-SONET (POS) APS interfaces, some APS operations may result
in an inappropriate protocol state. This situation may stop all traffic flow through the APS pair
or duplicate all packets.
Conditions: This symptom is observed on a Cisco 12000 series router.
Workaround: There is no workaround.
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CSCec72228:
Symptoms: When the encapsulation frame-relay interface configuration command is
configured on Cisco 12000 series POS APS interfaces, some APS operations may cause
interfaces (that have been selected by APS) to be set to “protocol down” by FR. This behavior
can result in the loss of all traffic over the APS pair.
Conditions: This symptom is observed on a Cisco 12000 series router.
Workaround: There is no workaround.
• CSCed09364
Symptoms: Ping packet that are larger than 1498 bytes may not pass successfully through a multilink
interface.
Conditions: This symptom is observed when a bridge group is configured on a multilink interface.
The symptom does not occur when there is no bridge group on the multilink interface.
Workaround: Change the maximum transmission unit (MTU) on the multilink interface from the
default value of 1500 bytes to 1498 bytes.
• CSCed10778
Symptoms: A failure of an active Route Processor (RP) may cause the standby RP to fail also.
Conditions: This symptom is observed in Cisco 12000 series Internet routers.
Workaround: There is no workaround.
• CSCed10965
Symptoms: All line cards may crash due to an IPC timeout or fabric ping timeout.
Conditions: This symptom is observed on a Cisco 12000 series with a PRP under heavy traffic
conditions. The output of the show controllers psar command shows excessive error events (e.g.
free queue empty events).
Workaround: There is no workaround. The fix for this DDTS adds the new show monitor
event-trace psar command to show any bursty error events that are traced but not visible in the
output of the show logging command.
• CSCed11730
Symptoms: It is not possible to use Hot Standby Router Protocol (HSRP) or Virtual Router
Redundancy Protocol (VRRP) virtual MAC addresses when HSRP or VRRP is configured over a
port channel interface.
Conditions: This symptom is observed on a Cisco 10720 router but may also be observed on other
Cisco platforms.
Workaround: Use the burn-in address (BIA) MAC address when you configure HSRP or VRRP over
port channel interfaces.