Specifications
13
Caveats for Cisco IOS Release 12.0
78-6455-12
Miscellaneous
• CSCdp92097
Cisco Encryption Technology (CET) may not work when weighted fair queueing (WFQ) is
configured on the interface of which crypto map is applied. There is no workaround.
• CSCdp95227
If you make a call from a Cisco AS5300 series universal access server that is running Cisco IOS
Release 12.0(7)T, you may not hear a ringback. The Cisco 3640 router that is running Cisco IOS
Release 12.0(7)XK at the remote end rings, but there is no voice path. You see a disconnect code
of “IE out of order” or “IE invalid length message” on the called end. The output of the debug isdn
q931 EXEC command shows “IE invalid” on the AS5300 universal access server. There is no
workaround.
• CSCdr05668
With some protocols, a packet may have its Time To Live (TTL) decremented an extra time. This
situation occurs only in transport mode while broadcasting Open Shortest Path First (OSPF)
HELLO packets.
Workaround: Use tunnel mode or a different routing protocol.
• CSCdr42549
With distributed Cisco Express Forwarding (deceive) enabled, the input counters on the show
interfaces EXEC command may overcount packets on a Versatile Interface Processor (VIP)
channelized serial interface and display the following results:
------------------------------------------ vip2c2#clear counters Clear "show
interface" counters on all interfaces [confirm] vip2c2#sh int ser4/0/0:0 stat
Serial4/0/0:0 Switching path Pkts In Chars In Pkts Out Chars Out Processor0000Route
cache 0 0 0 0 Distributed cache0000Total 0 0 0 0 vip2c2#sh int hssi12/0 stat Hssi12/0
Switching path Pkts In Chars In Pkts Out Chars Out Processor 3 411 2 368 Route cache 0
0 0 0 Distributed cache 0 0 0 0 Total 3 411 2 368 vip2c2#sho run int ser4/0/0:0 Building
configuration...
Current configuration: ! interface Serial4/0/0:0 ip address 22.0.0.2 255.0.0.0 no ip
directed-broadcast no ip route-cache distributed no keepalive no fair-queue end
vip2c2# ---------------------------------- vip2c1#ping Protocol [ip]: Target IP
address: 192.192.192.1 Repeat count [5]: 500 Datagram size [100]: 1015 Timeout in
seconds [2]: Extended commands [n]: Sweep range of sizes [n]: Type escape sequence to
abort. Sending 500, 1015-byte ICMP Echos to 192.192.192.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!
Success rate is 100 percent (500/500), round-trip min/avg/max = 292/304/1580 ms vip2c1#
-------------------------------------- vip2c2#sh int hssi12/0 stat Hssi12/0 Switching
path Pkts In Chars In Pkts Out Chars Out Processor 27 3978 23 3812 Route cache 500 509500
500 507500 Distributed cache0000Total 527 513478 523 511312 vip2c2#sh int ser4/0/0:0
stat Serial4/0/0:0 Switching path Pkts In Chars In Pkts Out Chars Out Processor 10 3190
10 3100 Route cache 500 509500 500 507500 Distributed cache 0 0 0 2000 Total 510 512690
510 512600 vip2c2#
There is no workaround.
• CSCdr49748
A Cisco 2600 series router may lose the startup configuration because of NVRAM corruption and
report the following error at the show startup-config command:
%% Non-volatile configuration memory has not been set up or has bad checksum