Cisco Cisco IOS Software Release 12.2
123
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(23c)
Cisco has made free software available to address these vulnerabilities. In some cases there are
workarounds available to mitigate the effects of the vulnerability.
workarounds available to mitigate the effects of the vulnerability.
This advisory is posted at
The disclosure of these vulnerabilities is being coordinated by the National Infrastructure Security
Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple
vendors whose products are potentially affected. Its posting can be found at:
Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple
vendors whose products are potentially affected. Its posting can be found at:
.
Resolved Caveats—Cisco IOS Release 12.2(23c)
Cisco IOS Release 12.2(23c) is a rebuild release for Cisco IOS Release 12.2(23). The caveats in this
section are resolved in Cisco IOS Release 12.2(23c) but may be open in previous Cisco IOS releases.
section are resolved in Cisco IOS Release 12.2(23c) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat:
•
Symptoms: A description of what is observed when the caveat occurs.
•
Conditions: The conditions under which the caveat has been known to occur.
•
Workaround: Solutions, if available, to counteract the caveat.
Interfaces and Bridging
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CSCeb81473
Symptoms: A Cisco 7500 series that is configured as a bridge may not pass bridged traffic on a FDDI
interface. This situation may lead to a loss of connectivity.
interface. This situation may lead to a loss of connectivity.
Conditions: This symptom is observed on Cisco 7500 series that runs a Cisco IOS rsp-jsv-mz image.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the FDDI interface.
interface configuration command on the FDDI interface.
Miscellaneous
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CSCee41842
Symptoms: “%TAGCON-3-LCLTAG_ALLOC: Cannot allocate local tag” error messages are seen
in the log as MPLS labels are not being freed properly.
in the log as MPLS labels are not being freed properly.
Conditions: This label leak problem has been noticed in BGP VPN when a locally learned VPN
prefix becomes a remote prefix. This will happen if a set of routes has at least one local path via CE
(could be EBGP learned or redistributed from VRF IGP) and one IBGP learned remote path. If the
local CE learned path flaps for some reason, there is a possible label leak caused by BGP.
prefix becomes a remote prefix. This will happen if a set of routes has at least one local path via CE
(could be EBGP learned or redistributed from VRF IGP) and one IBGP learned remote path. If the
local CE learned path flaps for some reason, there is a possible label leak caused by BGP.
Workaround: Increase the label range using the mpls label range x y command.
Resolved Caveats—Cisco IOS Release 12.2(23a)
Cisco IOS Release 12.2(23a) is a rebuild release for Cisco IOS Release 12.2(23). The caveats in this
section are resolved in Cisco IOS Release 12.2(23a) but may be open in previous Cisco IOS releases.
section are resolved in Cisco IOS Release 12.2(23a) but may be open in previous Cisco IOS releases.
The following information is provided for each caveat: