Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 180

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626
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Workaround: Reload to recover.
CSCsx78826
Symptoms: ES20 cards crash due to an address error after a remote Label Distribution Protocol
(LDP) session is shut. This is also seen when the remote router is reloaded.
Conditions: Occurs on a Cisco 7600 running Cisco IOS Release 12.2(33)SRD.
Workaround: There is no workaround.
CSCsx79111
Symptoms: MPLS packets that need a swap label may get punted to CPU because the outgoing
interface/label has wrong MTU value in hardware (MLS). Once the packet is punted to CPU, it is
forwarded correctly, as Cisco Express Forwarding (CEF) in software has correct info. If the traffic
rate is high, this causes high CPU.
-show mls status can confirm the MTU failure increasing.
-remote command switch show mpls platform vlan shows wrong MTU for outgoing interface.
-show mls cef mpls label X detail will show the MTU as 0.
-show mpls forwarding-table interface X detail shows good MRU value.
Conditions: Occurs on a Cisco 7600 running Cisco IOS Release 12.2(33)SRB5.
Workaround: Re-stating the mtu command or mpls ldp mtu ... does not make any difference. You
need to either bounce the affected interface or reload the switch.
CSCsx82880
Symptoms: MAC security on ESM20 ports stop working after unrelated configuration changes are
done to any other ports on the same ESM20.
Conditions: On ESM20 ports having service instances configured with MAC security on them,
traffic stops flowing on those EVCs when unrelated configuration changes are done on other ports
on that ESM20.
Workaround: Perform a shut/no shut on the affected port.
CSCsx94132
Symptoms: Router displays the following message:
SCP-SP-5-ASYNC_WATERMARK: 36152 messages pending in SCP async: LCP#4
If the number of pending messages keeps increasing, router may eventually crash.
Conditions: Occurs under the following scenario.
- With a switchport on ES20 - With more than few hundred allowed VLANs on ES20 trunk - If STP
state on the switchports flaps.
The last condition is critical for the bug to occur.
Workaround: Prevent conditions leading to STP flaps.
CSCsx94400
Symptoms: All traffic through ES line cards stops after a RSP failover. The line cards are powered
down and never recover.
Conditions: Occurs occasionally when a redundancy force-switchover is executed on a router
containing ES line cards with an N-PE redundancy configuration that looks like the following under
a VPLS VFI:
l2 vfi vfi101 manual
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