Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 159

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605
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Workaround: There is no workaround.
CSCsv73735
Symptoms: After performing a redundancy switchover (RPR+ mode), the ARP table is not correctly
populated. Entering the clear ip arp or the clear arp-cache commands, then pinging the connected
CE or PE causes an incomplete entry to be added to the ARP table.
Conditions: This is seen on Gigabit Ethernet, FastEthernet and POS interfaces. ATM and serial
interfaces seem do not appear to be affected. This behavior is not seen with stateful switchover
(SSO).
Workaround: There is no workaround.
CSCsv73754
Symptoms: A Cisco 10000 series router crashes. Traceback decode points to a function of
/jointfilesconvert/422273/bgp_vpn_impq_add_vrfs_cfg_changes.
Conditions: The symptom is observed while unconfiguring VRFs. It is most likely to be seen when
100 VRFs or more are unconfigured.
Workaround: There is no workaround.
CSCsv79584
Symptoms: An 0.0.0.0 binding with a 0 minute lease gets created and subsequently removed on the
DHCP unnumbered relay.
Conditions: The DHCP client sends a DHCPINFORM with ciaddr set to its address, but giaddr is
empty. The relay fills in giaddr with its IP address and the server replies to giaddr. Since the
DHCPACK is in response to DHCPINFOM, the lease-time option is absent. Relay receives the
DHCPACK and tries to process it normally leading to the route addition.
Workaround: There is no workaround.
Further Problem Description: This behavior can indirectly have a negative impact on the system by
triggering other applications to be called because the routing table change is triggered by such
DHCP requests. Examining “debug ip routing” for 0.0.0.0/32 reveals 0.0.0.0/32 route flapping.
CSCsv79673
Symptoms: Unicast flooding occurs for all traffic destined to VLAN SVI. MAC address for the
VLAN SVI is being learned dynamically.
Conditions: Changing the VLAN SVI configuration from IP to XCONNECT and back without
shutting down the interface will result in the router MAC being learned dynamically instead of being
installed as static. Normal aging occurs on the dynamic MAC, resulting in unicast flooding if the
MAC is removed from the MAC address table.
Workaround: Perform a shut/no shut on the affected VLAN SVI.
CSCsv79993
Symptoms: A Cisco 7600 may crash when a distribute-list is deleted.
Conditions: Crash occurs when removing a distribute-list from EIGRP. The distribute-list was one
of many that was sharing the same route-map and access-list. The crash only happens when multiple
protocols have the same direction distribute-list configured on the same interface, as in the following
example:
router eigrp 10
network 10.0.0.0
distribute-list 49 out Ethernet1/2.10
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