Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 376

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822
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Conditions: The symptom is observed if the show subscriber command is executed on the VTY
followed by a clearing of the main session.
Workaround: Use the show subscriber command only on the main TTY.
CSCsq62703
Symptoms: Intermediate System-to-Intermediate System (IS-IS) tries to access invalid memory
address and may cause router to stop working.
Conditions: Occurs when a switch over happens and standby router becomes active.
Workaround: There is no workaround.
CSCsq63041
Symptoms: Xconnect may not be able to be configured if "ip address" has already been configured
on the interface.
Conditions: The symptom is observed when attempting to configure IPv6 protocol demux under
xconnect, when "ip address" has already been configured.
Workaround: There is no workaround.
CSCsq63176
Symptoms: PA-MC-T3/E3-EC PA does not pass full traffic after a sudden burst near line rate.
Conditions: Occurs when 256 interfaces are configured on the port adapter with multilinks operating
on those serial interfaces.
Workaround: Configure fewer than 256 serial interfaces.
CSCsq63681
Symptoms: Router crashes with error:
Address Error (load or instruction fetch) exception, CPU signal 10, PC =0x4105B7D0
Conditions: Router must be configured with fast reroute (FRR) and Netflow. More specifically the
crash happens due to NetFlow learning flows (prefixes) that are taking the FRR protected path.
Workaround: Disable NetFlow by using the following global configuration command: no mls flow
ip.
Additional workaround suggestions:
1. Do not enable NetFlow on interfaces that are used by FRR. Enter no ip flow ingress on the
interfaces. 2. Use a different FRR path that does not have interface with NetFlow enabled. 3. Do not
use FRR.
Make sure the prefixes that are learned by NetFlow are not being routed through an FRR protected
path in the tunnel head end router.
CSCsq63731
Symptoms: If either the command vlan-id dot1aq vlan-id or the command vlan-range dot1aq
start-vlan-id end-vlan-id is configured on a main interface which is also configured for routing, and
an ARP packet is sent to the router on the configured VLAN, then the router may send an ARP reply
with a VLAN ID of zero.
Conditions: The symptoms are seen on a Cisco 2800 series and a Cisco 7200 series router when the
command vlan-dot1q vlan-id is configured on the GigabitEthernet interface of a Cisco 2800 series
router and encapsulation dot1q vlan- id is configured on the FastEthernet 2/1/2.1 interface.
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