I am deploying a new stack of MXLs in a new M1000e next week and I've been looking through the manual. I noticed a section entitled "Tunneling." For explanation all that is given is the following:
Tunneling supports RFC 2003, RFC 2473, and 4213. DSCP, hop-limits, flow label values, OSPFv2, and OSPFv3 are also supported. ICMP error relay, PATH MTU transmission, and fragmented packets are not supported.
I am wondering what this is about, and when it is appropriate to use it. What scenario requires this? Can anyone tell me? Thanks.