Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario descargar pdf (Pagina 16)

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Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8

OL-10394-05 Rev. R0

Conditions: Issue is seen after the router is upgraded to Cisco IOS Release 12.2(33)SRD3. The MTU

for the MLS CEF adjacency for the MPLS label is misprogrammed and shows up as 0. Should see

“MTU failures” incrementing in show mls stat.

Workaround: Flap the interface.

• CSCtd24840

Symptoms: There might be collisions during switchover leading to a critical “SCP find master

quiesce” message getting dropped.

Conditions: The symptom is observed with the presence of SIP400 and 67xx cards.

Workaround: There is no workaround.

• CSCtd38225

Symptoms: When ISG is enabled and DHCP sessions re-start just around the time their leases

expire, some sessions may get stuck dangling indefinitely. Sending DHCPDISCOVER message

(i.e.: re-starting the CPE) will not restore the session. The affected subscriber(s) will not be able to

establish a session.

Conditions: The issue seems to be a corner-case situation. It is observed when ISG is enabled and

DHCP sessions re-start just around the time their leases expire.

Workaround: The only known workaround is to manually clear the dangling session(s) using the

clear ip subscriber dangling time command although this may not be a suitable workaround in a

live production network.

• CSCtd67010

Symptoms: A Cisco 7600 series router that is running Cisco IOS Release 12.2(33)SRD3 may crash

in process “Ethernet OAM”.

Conditions: The symptom is observed on a Cisco 7600 series router that is running Cisco IOS

Release 12.2(33)SRD3. It is not necessary to have Ethernet OAM configured.

Workaround: There is no workaround.

• CSCtd73256

Symptoms: A Cisco Catalyst switch may reload while issuing the show ip ospf int command.

Conditions: The symptom is observed when the show ip ospf int command is paused while the

backup designated router neighbor goes down, for example:

c3560sw2#show ip ospf int

Vlan804 is up, line protocol is up

Internet Address 10.0.0.2/24, Area 0

Process ID 1, Router ID 10.0.0.2, Network Type BROADCAST, Cost: 1

Transmit Delay is 1 sec, State DR, Priority 1

Designated Router (ID) 10.0.0.2, Interface address 10.0.0.2

--More--

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8,

changed state to down

%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan804, changed

state to down

%OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.1 on Vlan804 from FULL to DOWN,

Neighbor Down: Interface down or detached

%LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to down

The next line that will be displayed in the “show ip ospf int” output will be the following:

Backup Designated router (ID) 10.0.0.1, Interface address 10.0.0.1

If at this point you press enter or spacebar to advance the output, the device will reload and the

following error message will be shown:

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 397 398

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