Specifications

55
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
• CSCds35017
A Cisco 12000 series Gigabit Switch Router (GSR) might reload when a map list entry that was
just configured is reconfigured. There is no workaround.
• CSCds39506
A Cisco 7500 series router that is functioning as a Multiprotocol Label Switching (MPLS) Provider
router and is running a release later than Cisco IOS Release 12.0(9.3)S might not be able to
properly forward MPLS packets that are coming into the router and are meant to be going out the
ATM PPP interface. This situation is typically observed as output drops on the ATM interface.
There is no workaround.
• CSCds42864
On a Cisco 12000 series Gigabit Switch Router (GSR), a limited number of virtual circuits are
available to each virtual path identifier (VPI) for the single-port OC-12 ATM and 4-port OC-3 ATM
line cards.
Workaround: Enter the atm vc-per-vp interface configuration command to change the number of
available virtual circuits.
• CSCds43793
Multiprotocol Label Switching (MPLS) packets with valid labels that are received on an interface
may be forwarded even though there is no MPLS application enabled on this interface. Only
interfaces in the global routing table are affected; interfaces configured in a VPN routing or
forwarding instance (VRF) are not affected. There is no workaround.
• CSCds45117
A Cisco 7500 series router might experience a Versatile Interface Processor (VIP) reload when
switching Multiprotocol Label Switching (MPLS) packets under certain conditions including, but
not necessarily limited to, interface flaps on that VIP. There is no workaround.
• CSCds49736
In a redundant topology including Packet-over-SONET (POS) IP and ATM Tagging (TC-ATM)
links, a Cisco 12000 series Gigabit Switch Router (GSR) that is running Cisco IOS Release 12.0 S
might experience problems with allocating tags on TC-ATM links when there are flapping links in
the core. The adjacent routers might get out of sync in tag virtual circuit (TVC) allocation, or the
traffic might be forwarded across a nonoptimal path.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command.
• CSCds50894
A Cisco 12008 Gigabit Switch Router (GSR) might reload with a “SYS-3-BADMAGIC” error
message after you upgrade from Cisco IOS Release 11.2(18)GS3 to Cisco IOS Release 12.0(11)S3.
In this situation, the decode reveals that the reload occurred in validblock(). The router will appear
to stabilize after one or two reloads. There is no workaround.
• CSCds54982
The Cisco Express Forwarding (CEF) table does not get updated properly on the Gigabit Ethernet
line card.
Workaround: Enter the clear ip cef command in EXEC mode to refresh the CEF table.
• CSCds59194
A Cisco router that is running Cisco IOS Release 12.0(12.3)S may experience problems passing
non-Gigabit Route Processor (GRP)-sourced traffic out Packet-over-SONET (POS) line cards.
When this situtation occurs, all traffic from external sources passing through the line card that is