HP 6125XLG R2306-HP 6125XLG Blade Switch TRILL Configuration Guide - Page 11

A non-DRB uses the VLANs in the following set for sending Hello frames: enabled VLANs ∩ (designated VLAN ∪ (announcing VLANs ∩ forwarding VLANs)). The concepts and symbols used in this section are explained as follows: • Enabled VLAN-VLAN enabled on the port. • Designated VLAN-VLAN that forwards TRILL frames except Hello frames between RBs. On the HP 6125XLG Blade switch of Release 2306, the designated VLAN of a link is the lowest-numbered enabled VLAN of the link. • Forwarding VLAN-VLANs for which an RBridge port is appointed VLAN forwarder on the port. • ∩ and ∪-Set operation symbols. ∩ indicates set-theoretic intersection, and ∪ indicates set-theoretic union. To configure the announcing VLANs: Step 1. Enter system view. 2. Enter Ethernet interface view or aggregate interface view. 3. Configure announcing VLANs. Command system-view Remarks N/A interface interface-type interface-number N/A trill announcing-vlan { vlan-list | null } By default, no announcing VLAN is configured, and the announcing VLANs are the enabled VLANs. Configuring TRILL timers You can configure the following TRILL timers: • Hello interval and Hello multiplier-An RB advertises Hello frames at the Hello interval to maintain a TRILL adjacency. The shorter the Hello interval, the faster the network convergence. However, a shorter Hello interval consumes more system resources. The adjacency holding time is obtained by multiplying the Hello interval by the Hello multiplier. The RB advertises the adjacency holding time to neighbors through Hello frames. If a neighbor does not receive any Hello frame from the RB before the adjacency holding time expires, it removes the TRILL adjacency with the RB. • Inhibition time-An RB that acts as the AVF of a VLAN guarantees that frames from the VLAN have only one incoming port or one outgoing port along a link. When other RBs receive frames from the VLAN, they do not perform any processing. However, when the RB detects that a root bridge change occurs on a link or that the AVF advertised by other RBs conflicts with the local AVF, the RB inhibits the local AVF for a certain time to avoid loops. When the inhibition time expires, if the RB is still the AVF of the VLAN, the RB restores the role of AVF. • CSNP interval-On a broadcast network, the DRB advertises CSNPs at the CSNP interval to perform network-wide LSDB synchronization. A CSNP records all LSP digests of the local LSDB. When an RB receives a CSNP, the RB compares the CSNP against the local LSDB to verify whether some LSPs are aged out or missing. If the CSNP has an LSP digest that the local LSDB does not have, the RB sends a PSNP packet to request the LSP. To configure TRILL timers: 8