Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 144

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Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
ISAKMP is enabled.
WORKAROUND:
None.
FURTHER INFORMATION:
This issue can occur if the Cisco IOS device processes a malformed IKE message.
CSCsu57331
Symptoms: In a Virtual Private LAN Services (VPLS) scenario with ESM20 as core facing interface,
imposition traffic might fail.
Conditions: Occurs only when ports from Bay 1 are used as core facing interface.
Workaround: Reset the line card.
CSCsu57958
Symptoms: In a scenario where a Catalyst 6500 or Cisco 7600 performs DHCP snooping + DAI
functionality and a second device acts as DHCP relay, it was observed that DHCP snooping database
was not populated. DHCP snooping is configured in this case on the ingress VLAN (traffic from the
DHCP clients) and the DHCP server can be reached on a different egress VLAN (DHCP requests
are routed).
DHCP Replies from the server (DHCPOFFER and DHCPACK) are not snooped by the Catalyst
6500 or Cisco 7600 and so bindings are not established. Consequence is that clients will get their
own IP Address but ARP Inspection will fail because bindings were not learned on the device.
Conditions: Occurs with DHCP Snoooping + DAI configured on a Catalyst 6500 or Cisco 7600 in
a routed scenario (Ingress VLAN and Egress VLAN are different) and DHCP Relay performed by
a different device.
Workaround: Configure DHCP Snooping on both client and server side VLANs. Problem is
applicable to both Cisco IOS Release 12.2(18)SXF and Cisco IOS Release 12.2(33)SRB.
CSCsu62667
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.
CSCsu63994
Symptoms: With L2TPv3 sessions configured on the active RP, the CPU on standby RP is being used
to setup L2TPv3 sessions to peer. The standby keeps attempting to establish all L2TPv3 sessions,
which obviously fail to establish, and hence it keeps on retrying forever. This is a waste of standby
RP CPU, since there is no point in attempting to establish sessions with peer on standby.
Conditions: Occurs when L2TPv3 pseudowires are configured on a router with active and standby
RPs.
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.
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