Configuring Trill Timers - H3C S12500 Series Configuration Manual

The concepts and symbols used in this section are explained as follows:
Enabled VLAN—VLAN enabled on the port.
•
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.
The designated VLAN forwards TRILL frames (except Hello frames) between RBs.
• If no designated VLAN is configured for the DRB of a link, the frames are exchanged through the
lowest-numbered enabled VLAN.
If a designated VLAN is configured for the DRB of a link, the frames are exchanged through the
•
designated VLAN.
To configure the announcing VLANs and designated VLAN:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
3. Configure announcing
VLANs.
4. Configure the designated
VLAN.

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:
Command
system-view
interface interface-type
interface-number
trill announcing-vlan { vlan-list | null }
trill designated-vlan vlan-id
10
Remarks
N/A
N/A
By default, no announcing VLAN is
configured, and the announcing
VLANs are the enabled VLANs.
By default, no designated VLAN is
configured.