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Caveats
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While running Cisco IOS Release 12.2(50)SG or 12.2(50)SG1 and using WS-X4648-GB-RJ45V or
WS-X4648-GB-RJ45V+ line cards, on a rare occasion, you will observe the following syslog error
message although the PoE line card is functioning correctly:
%C4K_ETHPOE-3-POEMICROCONTROLLERWARNING: Switching module in slot [x] needs to be
reset.
This log message is informational only; it does not reflect a potential problem with the linecard.
It only impacts the WS-X4648-GB-RJ45V and WS-X4648-GB-RJ45V+ line cards.
Workaround: Ignore the warning message; take no action to reset the linecard or port(s). You do
not need to perform an RMA (Return to Manufacturing for Analysis) nor submit the line card for
EFA (Engineering Failure Analysis).
(CSCsx32444)
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Hosts are not authenticated through MAB when you configure a port for single-host mode (with the
authentication host-mode single-host command) and Wake-on-LAN (with the
authentication control-direction in command).
Workarounds: Disable Wake-on-LAN with the authentication control-direction in command.
CSCsx98360
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On a Catalyst 4900M switch, when you use a WS-X4908-10GE card with CVR-X2-SFP twin gig
converters, the giga ports do not link up to the peer device that sends a remote fault. The
show int status | inc gi x/y command indicates notconnect.
Similar behavior is observed with Supervisor Engine 6-E uplinks and the WS-X4706-10GE line
card.
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On a Catalyst 4900M switch, when you use a WS-X4908-10GE card with CVR-X2-SFP twin gig
converters, the giga ports do not link up to the peer device that sends a remote fault. The
show int status | inc gi x/y command indicates notconnect.
Similar behavior is observed with Supervisor Engine 6-E uplinks and the WS-X4706-10GE line
card.
This behavior is seen in Cisco IOS Releases 12.2(50)SG thru 12.2(50)SG3 when the peer device
sends a remote fault.
Workaround: Disable auto negotiation at both ends.
(CSCta02425)
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Attempting to use the nested policy-map feature on Supervisor Engine-6E can cause the switch to
reboot.
Workaround: Do not use the nested policy-map feature in Cisco IOS Release 12.2(40)SG and
12.2(44)SG. (CSCsy80664)
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Output IPv6 ACLs with Ace to match on the ICMP option fail on a switch.
The following conditions may cause a RACL to malfunction:
– ACL are applied on the output direction of the interface.
– IPv6 ACL contain Ace to match on the ICMP option fields (ICMP Type or ICMP Code).
Here are two examples of such non-functioning RACL:
IPv6 access list a1
permit icmp any any nd-ns sequence 10
deny ipv6 any any sequence 20
IPv6 access list a2
Release Notes for the Catalyst 4500 Series Switch, Cisco IOS Releases 12.2(54)SG to 12.2(37)SG
OL-5184-91
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