MTU Probe
RBridges must be able to determine the maximum MTU size supported by its
neighbors on every link. To determine this, there are two new TRILL messages that are used:
MTU-Probe and MTU-Ack. Both packets are always padded to the maximum MTU size supported by the
sending RBridge. Sending of the MTU-Probe is optional, but the successful reception of an
MTU-Probe must always be acknowledged. RBridges will advertise maximum MTU supported for the
link in subsequent Hellos. RBridges may also advertise the supported MTU size determined for
each of its link in the LSP.
Note
This MTU discovery is only used for sizing the control plane
messages, the data plane packet size is independent of this.
Print
this page
Email this topic
Feedback
View PDF
Download EPUB