Sup32 GRE in hardware

[Alexey Stytsenko]

Good day!

In Sup32 Q&A section stays that

Q. What PFC3B features will the Sup32 support at FCS?
GRE tunneling
HW ready, IOS required

In

Cisco Catalyst 6500 Wiring Closet Innovations Architecture Overview stays that

GRE Feature support is dependent on software 

Can  any1 help with finding information about starting version IOS from what this feature supported, or those quotations meant that it works with any IOS but not CatOS?

Appreciate your responses!

[Edison Ortiz · Accepted solution]

GRE is supported on PFC3 for quite some time

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst6500/ios/12.2SXF/native/release/notes/features.html#wp1342672

Hardware-assisted IP-in-IP  tunneling and generic routing encapsulation (GRE) tunneling—The PFC3  and DFC3s support the following tunnel commands:

–tunnel destination

–tunnel mode gre

–tunnel mode ipip

–tunnel source

–tunnel ttl

–tunnel tos

Other supported types of tunneling run in software on the MSFC3. The  PFC3 does not provide hardware acceleration for tunnels configured with  the tunnel key command.

The tunnel ttl command (default 255) sets the TTL of encapsulated packets.

The tunnel tos command, if present, sets the ToS byte of a packet when it is encapsulated. If the tunnel tos command is not present and QoS is not enabled, the ToS byte of a packet  sets the ToS byte of the packet when it is encapsulated. If the tunnel tos command is not present and QoS is enabled, the ToS byte of a packet as  modified by PFC QoS sets the ToS byte of the packet when it is  encapsulated.