Specifications

105
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(5)
• CSCdm01992
When LECS mastership changes from Fast SSRP aware LECS to old-style LECS, and the LES
changes from old-style to new-style LES, all clients should join to the new-style primary LES.
However, in some situations the new-style clients (Fast SSRP aware clients) stay joined to the
secondary LES (old style LES) instead of joining to the primary LES (new style LES). This
problem occurs in Cisco IOS Release 11.3 and Release 12.0.
Workaround: Upgrade to Release 11.2(12) if you are running Release 11.2 images. Upgrade to
11.3(8)WA(4.11) if you are running Release 11.3 images. Upgrade to Release 12.0(4.1) if you are
running Release 12.0 images. These upgrades will only give you guaranteed backward
compatibility. To get the full benefits of Fast SSRP, all images should be upgraded to at least
Release 12.0(5)T.
• CSCdm04447
The Frame Relay route statement is deleted from the configuration when DLCI is removed due to
a leased-line disconnection. There is no workaround.
• CSCdm06362
A Cisco router might not react to a frame sent by a Vax if the frame is an LLC2 frame (DISC) with
the P bit set. There is no workaround.
• CSCdm12648
All platforms running MLP might potentially encounter a transient error condition where no links
are assigned to a multilink bundle. There is no workaround.
• CSCdm14618
With load sharing multiple HomeGateways from one network access server (NAS) in a VPDN
configuration, the NAS only uses the IP address to determine the tunnel ID to be used. This
condition occurs even if a different tunnel ID is returned by way of RADIUS.
Workaround: Have your RADIUS or configuration only return one home gateway to the NAS for
use.
• CSCdm18137
A Cisco 7206 ISDN router that runs Cisco IOS Release 11.3(8)AA1 might experience unexpected
PPP LCP timeouts. An error message similar to the following is displayed:
Mar 10 05:54:03.774: Se1/0:12 LCP: State is Listen Mar 10 05:54:03.850: Se1/0:12 PPP:
I pkt type 0xC021, datagramsize 21 Mar 10 05:54:03.850: Se1/0:12 LCP: I CONFREQ [Listen]
id 0 len 17 Mar 10 05:54:03.850: Se1/0:12 LCP: MagicNumber 0x0000022C (0x05060000022C)
Mar 10 05:54:03.850: Se1/0:12 LCP: PFC (0x0702) Mar 10 05:54:03.850: Se1/0:12 LCP: ACFC
(0x0802) Mar 10 05:54:03.850: Se1/0:12 LCP: Callback 6 (0x0D0306) Mar 10 05:54:05.774:
Se1/0:12 LCP: TIMEout: State Listen Mar 10 05:54:05.774: Se1/0:12 LCP: O CONFREQ
[Listen] id 2 len 15 Mar 10 05:54:05.774: Se1/0:12 LCP: AuthProto CHAP (0x0305C22305)
There is no workaround.
• CSCdm19188
An ISDN interface might loose packets and headers when the switch type is PRI_4ESS or
PRI_5ESS, a connect request is sent by the router, and the switch dose not respond to a connect
within T313. This causes the connect to be retransmitted, and the packet and header memory to not
be released. There is no workaround.