Cisco Cisco IOS Software Release 12.4(23) Notas de publicación
731
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(5)
ISO CLNS
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CSCei04683
Symptoms: A router may advertise an IPv6 default route into a level-2 topology.
Conditions: This symptom is observed when the following conditions are present:
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The router runs the IS-IS routing protocol on both level 1 and level 2.
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The router advertises IPv6 prefixes.
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The router has the IS-IS ATT bit set.
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The router has level-1 connectivity to another level-1/level-2 IS-IS router.
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An SSO switchover occurs on the router or the router loses and then regains connectivity to the
level-2 topology.
level-2 topology.
Workaround: Trigger a change that causes the router to regenerate its level-2 LSP.
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CSCei12603
Symptoms: A 30 to 40 ms interruption in traffic forwarding may occur when you modify the tunnel
mpls traffic-eng bandwidth command for an MPLS traffic-engineering tunnel.
mpls traffic-eng bandwidth command for an MPLS traffic-engineering tunnel.
Conditions: This symptom is observed on a router that is configured for MPLS traffic engineering
with IS-IS as the associated IGP.
with IS-IS as the associated IGP.
Workaround: There is no workaround.
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CSCei58655
Symptoms: A route that fails remains in the routing table with its old metric, preventing an alternate
route from being used and causing a routing loop.
route from being used and causing a routing loop.
Conditions: This symptom is observed in a network that is configured for IS-IS and iSPF when the
IP routes that are advertised in a fragmented LSP do not age-out during a rerouting failure.
IP routes that are advertised in a fragmented LSP do not age-out during a rerouting failure.
Workaround: Remove iSPF from the IS-IS process by entering the router isis command followed
by the no ispf command.
by the no ispf command.
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CSCsa82134
Symptoms: A router that is configured for IS-IS may reload unexpectedly.
Conditions: This symptom is observe on a Cisco router when there are more than 64 equal-cost next
hops for an IPv6 route that is learned from IS-IS.
hops for an IPv6 route that is learned from IS-IS.
Workaround: There is no workaround. However, the conditions are unlikely to occur in a production
network.
network.
Miscellaneous
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CSCdz18851
Symptoms: When you reload microcode onto a line card or perform an OIR of a line card, a spurious
memory access error may be logged on some or all other line cards in the router.
memory access error may be logged on some or all other line cards in the router.
Conditions: This symptom is observed on a Cisco router that is configured for IPv6 dCEF when an
IPv6 route is loadbalanced across two equal cost paths that both leave the router on interfaces of the
same line card, which is the line card onto which you reload microcode or on which you perform an
OIR.
IPv6 route is loadbalanced across two equal cost paths that both leave the router on interfaces of the
same line card, which is the line card onto which you reload microcode or on which you perform an
OIR.
Workaround: There is no workaround.