Reference Guide

370 | IPv6 Basics
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Path MTU Discovery
IPv6 MTU Discovery is supported on platforms c e s
Path MTU (Maximum Transmission Unit) defines the largest packet size that can traverse a
transmission path without suffering fragmentation. Path MTU for IPv6 uses ICMPv6 Type-2
messages to discover the largest MTU along the path from source to destination and avoid the need to
fragment the packet.
The recommended MTU for IPv6 is 1280. Greater MTU settings increase processing efficiency because
each packet carries more data while protocol overheads (headers, for example) or underlying per-packet
delays remain fixed.
MLDv1 Snooping 7.4.1 8.2.1 IPv6 Multicast in this chapter
Multicast IPv6 in the FTOS Command Line
Reference Guide
MLDv2 Snooping 8.3.1.0 8.3.1.0 IPv6 Multicast in this chapter
Multicast IPv6 in the FTOS Command Line
Reference Guide
IPv6 QoS
trust DSCP values 7.4.1 8.2.1 QoS for IPv6 in this chapter
Table 17-2. FTOS and IPv6 Feature Support (continued)