Currently, Cat6k Sup720 supports GRE & IPIP mode of tunneling in HW. Tunnel tos & Tunnel ttl options are also supported in HW.
Certain tunnel features, such as tunnel checksum, tunnel path-mtu-discovery,
tunnel sequence-datagrams, tunnel flow egress-records, tunnel key when applied
on the interface, are supported in software. For features requiring software
processing, we create a 'punt' adjacency in HW, to punt the packet to the software
path. Tunnel mode nos is supported in software. Also, IPX & Appletalk & Multicast & NAT tunneling are supported in software. Packets requiring fragmentation (where input interface mtu > tunnel ip mtu) are sent to software for fragmentation.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...