Cisco Cisco IOS Software Release 12.4(2)XB6

Caveats describe unexpected behavior or defects in the Cisco IOS software releases. Severity 1 caveats 
are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the 
least serious of these three severity levels.

Caveats in Cisco IOS Release 12.4(4)T are also in Cisco IOS Release 12.4(4)XC. For information on 
caveats in Cisco IOS Release 12.4(4)T, see 

document. This 

document lists severity 1 and 2 caveats.

If you have an account with 

, you can also use the Bug Toolkit to find select caveats of any 

severity. To reach the Bug Toolkit, go to: 

This section documents possible unexpected behavior by Cisco IOS Release 12.4(4)XC and describes 
only severity 1 and 2 caveats and selected severity 3 caveats.

This section contains the following caveat information:

CSCec12299

Devices running Cisco IOS versions 12.0S, 12.2, 12.3 or 12.4 and configured for Multiprotocol 
Label Switching (MPLS) Virtual Private Networks (VPNs) or VPN Routing and Forwarding Lite 
(VRF Lite) and using Border Gateway Protocol (BGP) between Customer Edge (CE) and Provider 
Edge (PE) devices may permit information to propagate between VPNs.