Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 294

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Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
CSCsl95664
Symptoms: In a Cisco 7600 series router with hundreds of l2 VCs and l3 VRFs configured, after a
reload, traffic to the l3 VPN prefixes having aggregate labelS might experience 10-20 minutes of
failure before recovering.
Conditions: This happens only in scaled configurations with hundreds of VRFs and L2 VCs with
QoS enabled.
Workaround: There is no workaround.
Further Problem Description: After PE reload, all L3VPN traffic destined for aggregate labels takes
a long time (20 minutes +) to recover. There seems to be a significant delay in getting the forwarding
entries programmed in HW for aggregate labels.
CSCsl96254
Symptoms: If an EIGRP distribute-list that is applied to an interface allows a route, the route will
be installed into the routing table without first checking to see if the global distribute-list allows it
as well. All platforms are affected.
access-list 1 permit any access-list 2 deny any
router eigrp 1 network 192.168.1.0 0.0.0.255 distribute-list 1 in FastEthernet0/0 distribute-list 2 in
no auto-summary
The configuration above should deny all routes by virtue of access-list 2. Instead, all routes are
allowed per access-list 1.
Conditions: Running EIGRP with interface distribute lists and a global distribute list. All platforms
are affected.
Workaround: Currently the only workaround is to apply the global distribute list to each interface
distribute list.
CSCsl96335
Symptoms: When a subscriber connects and disconnects from an ASR1000 at a high level of calls
per second, the system may encounter an error with the following traceback:
ASR1000-EXT-SIGNAL: U_SIGSEGV(11), Process = AAA SEND STOP EVENT
Conditions: The symptoms are observed when an ASR1000 is functioning as LAC or LNS with
ACL, QoS and uRPF features. AAA accounting is enabled for tunnel, sessions and PPP.
Workaround: If the error is encountered persistently, consider disabling AAA accounting as
temporary remedy.
CSCsl96370
Symptoms: A CPUHOG message may be seen.
Conditions: This symptom is observed when the following three conditions are met:
1. HSRP debugs are enabled.
2. The router is logging to console.
3. An interface with more than 50 HSRP groups is shut down.
Workaround: There is no workaround.
CSCsl96417
Symptoms: Router crashes during ISSU upgrade.
Conditions: Occurs during ISSU upgrade with ATM PVCs (configured with xconnect). The router
crashes on running the ISSU runversion command.
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