Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Uživatelský manuál Strana 204

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Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Symptoms: LSP ID change after stateful switchover (SSO) due to failure in signaling recovered
label switched path (LSP).
Conditions: Occurs following a SSO switchover.
Workaround: There is no workaround.
CSCsu63996
Symptoms: NSF restart may be terminated and OSPF NBR may flap during RP switchover. The
debug ip ospf adj command shows the following message: OSPF: Bad request received.
Conditions: The symptoms are observed when the links are broadcast networks and the restarting
router is DR. It is seen when "nsf cisco" is configured and when some neighbors finish OOB resync
much sooner than others.
Workaround: Use the nsf ietf command.
Alternate workaround: Configure routers so that the restarting router is not DR (use ospf network
type point-to-point or priority 0).
CSCsu64215
Symptoms: Router may incorrectly drop non TCP traffic. TFTP and EIGRP traffic can be impacted
as seen in CSCsv89579.
Conditions: Occurs when the ip tcp adjust-mss command is configured on the device.
Workaround: Disable ip tcp adjust-mss on all interfaces. Note that this may cause higher CPU due
to fragmentation and reassembly in certain tunnel environments where the command is intended to
be used.
CSCsu65189
Symptoms: If router is configured as follows:
router ospf 1 ... passive-interface Loopback0
And later is enabled LDP/IGP synchronization using command
Router(config)#router ospf 1 Router(config-router)# mpls ldp sync Router(config-router)#^Z
MPLS LDP/IGP synchronization will be allowed on interface loopback too.
Router#sh ip ospf mpls ldp in Loopback0 Process ID 1, Area 0 LDP is not configured through LDP
autoconfig LDP-IGP Synchronization : Required < ---- NOK Holddown timer is not configured
Interface is up
If the clear ip ospf proc command is entered, LDP will keep the interface down. Down interface is
not included in the router LSA, therefore IP address configured on loopback is not propagated. If
some application like BGP or LDP use the loopback IP address for the communication, application
will go down too.
Conditions: Occurs when interface configured as passive. Note: all interface types configured as
passive are affected, not only loopbacks.
Workaround: Do not configure passive loopback under OSPF. Problem only occurs during
reconfiguration.
The problem will not occur if LDP/IGP sync is already in place and: - router is reloaded with image
with fix for CSCsk48227 - passive-interface command is removed/added
CSCsu65225
Symptoms: TFTP from supervisor to ACE modules fail.
Conditions: Results in the inability to copy/upgrade images to standby ACE. This is due to moving
all 127.x.x.x addresses in an internal VPN routing/forwarding (VRF), which causes TFTP to fail.
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