Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

• CSCds16995

On a Cisco 7500/RSP series router, if you deconfigure a link from a bundle while Distributed

Multilink PPP (DML-PPP) is running and the link is assigned an IP address, pings through this link

will fail. In this situation, the link that has been deconfigured can no longer carry traffic.

Workaround: Deconfigure the whole bundle and then reconfigure the bundle without this link. After

you perform this action, the link should function properly.

• CSCds17239

If a Cisco 12000 series Gigabit Switch Router (GSR) is configured with access control lists (ACLs)

that are longer than 128 lines, and these ACLs are applied inbound on an Engine 2 (PSA-based)

line card interface, traffic that is destined for the router may be dropped. This situation applies to

traffic such as Internet Control Message Protocol (ICMP), Simple Network Management Protocol

(SNMP), and routing protocol updates.

This situation is seen only on Engine 2 (PSA) line cards, and only when an ACL longer than 128

lines is applied inbound. No other configurations are vulnerable to this defect. There is no

workaround.

TCP/IP Host-Mode Services

• CSCds13972

Border Gateway Protocol (BGP) sessions on Cisco 12000 series Gigabit Switch Router (GSR)

might fail to send updates when the router establishes passive BGP sessions because of problems

with the flow control of BGP and TCP.

Workaround: Use an inbound Access Control List (ACL) to deny any traffic destined for the port,

and always open the session actively.

Wide-Area Networking

• CSCdr68102

PA-A1 port adapters do not function when installed in bay 1 of a Versatile Interface Processor 4

(VIP4).

Workaround: Install PA-A1 port adapters in bay 0 of VIP4s.

Resolved Caveats—Cisco IOS Release 12.0(12)S

All the caveats listed in this section are resolved in Cisco IOS Release 12.0(12)S. This section describes

only severity 1 and 2 caveats.

Basic System Services

• CSCdp97532

Snmpboots, a boot counter for SNMP Version 3, is incremented and saved during bootup, which

might cause a noticeable bootup delay. This bootup delay will occur only when SNMP Version 3 is

configured. There is no workaround.