H3C Technologies H3C S12500-X Series Switches - Manual (Page 53)

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The VXLAN IS-IS hello interval multiplied by the hello multiplier.
VTEPs send their adjacency hold time in hello packets to update the adjacencies with their neighbors. A
VTEP removes the adjacency with a neighbor if it does not receive a hello packet from the neighbor
before the timer expires.
The maximum adjacency hold time is 65535 seconds. If this limit is exceeded, the actual adjacency hold
time is set to 65535 seconds.
To set the VXLAN IS-IS hello interval and the hello multiplier on a VXLAN or NVE tunnel interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VXLAN or NVE
tunnel interface view.
interface tunnel tunnel-number
[ mode { nve | vxlan } ]
N/A
3. Set the VXLAN IS-IS hello
interval.
overlay isis timer hello seconds
The default hello interval is 10
seconds. The hello interval of a DED is
one-third of the configured hello
interval.
4. Set the hello multiplier for
calculating the
adjacency hold time.
overlay isis timer holding-multiplier
value
The default multiplier is 3.
Configuring the DED priority and CSNP interval
On each VXLAN tunnel, the VTEP with higher DED priority is elected the DED to periodically send CSNP
packets for LSDB synchronization. If the VTEPs have the same DED priority, the one with the higher MAC
address is elected.
To set the DED priority and CSNP interval:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VXLAN or NVE
tunnel interface view. interface tunnel tunnel-number [ mode
{ nve | vxlan } ]
N/A
3. Set the DED priority of the
VTEP on the tunnel
interface. overlay isis ded-priority value The default DED priority is 64.
4. Set the CSNP interval. overlay isis timer csnp seconds
The default CSNP interval is 10
seconds.
The setting takes effect if the VTEP
is elected the DED on the VXLAN
tunnel.
Tuning LSP timers
Change LSP timer settings depending on network stability to increase the network convergence speed
and protect CPU from unnecessary route recalculations.