Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

• CSCdr35856

If you enter the show ip mds summary EXEC command or the show ip mds forwarding EXEC

command at the Versatile Inter face Processor/line card (VIP/LC) console, then a counter to track

the number of multicast routes might be incorrectly decremented and underflow to a huge number.

The VIP/LC console might display a syslog message similar to the following:

%MDS-4-ROUTELIMIT: 4294967237 routes exceeded multicast route-limit of 2147483647

If this situation occurs, no additional multicast routes can be created and the router must be

restarted.

Workaround: Do not use the show ip mds summary EXEC command or the show ip mds

forwarding EXEC command at the VIP/LC console.

• CSCdr45483

A Cisco router with multicast configured might reload with a bus error if there are severe unicast

route updates. There is no workaround.

ISO CLNS

• CSCdr09770

Configuring a tunnel bandwidth requirement change to a Multiprotocol Label Switching/traffic

engineering (MPLS/TE) tunnel might cause Intermediate System-to-Intermediate System (IS-IS)

routes that are accessible through that tunnel interface and their corresponding Cisco Express

Forwarding (CEF) entries to be unnecessarily reinstalled when subsequent shortest path

calculations are done.

Workaround: If MPLS/TE announces new tunnel information to IS-IS routes after the bandwidth

change has taken effect, this spurious RIB updates behavior can be cleared. The following are a few

actions that can clear this behavior:

–

Configuring an MPLS/TE tunnel metric

–

Adding or removing MPLS/TE tunnels to the same tail-end as the tunnel that changed

bandwidth. This can include both the current MPLS/TE tunnel and additional tunnels to the

same tail-end.

• CSCdr21706

A Cisco router that is running Cisco IOS Release 12.0(3.5)S or later releases might experience a

reload with both Border Gateway Protocol (BGP) and Intermediate System-to-Intermediate System

(IS-IS) routing running and a configuration setting the BGP administrative distance to 115. In this

situation, the following traceback immediately precedes the reload (<>> indicates a variable value):

%CLNS-1-BKUPERR: ISIS: No NDB back pointer in 0x<>, ndb_next 0x0, ndb_prev 0x0, lsp_next

0x0, lsp_prev 0x0, metric 0x0, index 0, 0x0

Workaround: Configure a BGP administrative distance different from 115.

Miscellaneous

• CSCdm69594

The interface delay metric is set incorrectly for port channel interfaces where one or more Gigabit

Ethernet interfaces are grouped into a channel. The delay for a single Gigabit Ethernet interface is

10 microseconds. The delay for a port channel made up of one or more Gigabit Ethernets is 100

microseconds. The incorrect setting might seriously impact routing protocols that use interface