Datasheet
286
Release Notes for Cisco IOS Release 12.1E on the Catalyst 6500 and Cisco 7600 Supervisor Engine and MSFC
OL-2310-11
Caveats
This problem is resolved in Release 12.1(8b)E14. (CSCea28131)
• Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol
version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of
crafted IPv4 packets sent directly to the device may cause the input interface to stop processing
traffic once the input queue is full. No authentication is required to process the inbound packet.
Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not
affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at:
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
This problem is resolved in Release 12.1(8b)E14. (CSCdz71127, CSCea02355)
• With a Supervisor Engine 2 and a multicast receiver attached through a Layer 3 port on a
WS-X6816-GBIC module and another receiver for the same multicast groups attached through a
Layer 2 switchport, after a reset of the x6816 module, the Layer 3 port does not forward multicast
traffic; or occasionally any forwarded multicast traffic is switched in software. This problem is
resolved in Release 12.1(8b)E14. (CSCdy60173)
• When some multicast RPF interfaces are tunnel interfaces, a Supervisor Engine 1 with an MSFC1
might reload when the routing table changes frequently. This problem is resolved in
Release 12.1(8b)E14. (CSCea50623)
• If MMLS is not synchronized between the MSFC and the supervisor engine when you enter a clear
ip mr * command or a clear ip mroute group_address command, the MMLS entry on the supervisor
engine might not be cleared. This problem is resolved in Release 12.1(8b)E14. (CSCdy51453)
• IEEE 802.1Q tunnel ports on WS-X6548-RJ45 switching modules drop ingress packets that are less
than 68 bytes long when the packets are from a third-party device. This problem is resolved in
Release 12.1(8b)E14. (CSCea50981)
• If a (S,G) state is created by receiving a prune at the source’s first hop router, and then if the source
starts sending, the registering process does not occur, which leads to the loss of multicast traffic.
This usually happens when the source was sending traffic initially, and then stopped sending, and
then starts sending again. This problem is resolved in Release 12.1(8b)E14. (CSCdw71336)
• If the NAT configuration on a flow’s input and output interfaces indicate that NAT translation is
required, the flow is switched in software even if no address translation mapping exists for the
source. This problem is resolved in Release 12.1(8b)E14. (CSCdz33185)
• In an intermediate router where (*,G) and (S,G) traffic is RPF multicast fast dropped and the (*,G)
traffic and the (S,G) traffic have different RPF interfaces, when an RPF change happens for the (S,G)
entries, the intermediate router deletes the (S,G) entry but does not delete the (*,G) entry, which
causes the multicast traffic to use (*,G) entry in HW and get dropped as non-RPF traffic. This
problem is resolved in Release 12.1(8b)E14. (CSCea60918)
• In a redundant configuration that includes Supervisor Engine 2 running a Release 12.1(8a)E through
Release 12.1(8b)E13 image, an SFM, and a WS-X6816-GBIC switching module, after a switch over
to the redundant Supervisor Engine 2 due to a failure of the active Supervisor Engine 2, the
previously active Supervisor Engine 2 keeps resetting and does not come up as the new redundant
supervisor engine. This problem is resolved in Release 12.1(8b)E14. (CSCea43370)
• With a PFC2 and DFCs, do not configure SPAN sessions that include interfaces on fabric-enabled
switching modules. This problem is resolved in Release 12.1(8b)E14. (CSCea07663)
• A reload might occur when you enter the show scp mcast group 127 command or the command
might wrongly display some processors to be part of group 127 that are not. This problem is resolved
in Release 12.1(8b)E14. (CSCdz85864)