Adjusting The Spf Algorithm Parameters - H3C S12500 Series Configuration Manual

To adjust LSP-related parameters:
Step
1. Enter system view.
2. Enter TRILL view.
3. Set the LSP maximum
age.
4. Set the LSP refresh
interval.
5. Configure the
maximum length of an
LSP originated by an
RB.
6. Configure the
maximum length of an
LSP that can be
received by an RB.
7. Set the Overload bit of
LSPs and set the lifetime
for the set Overload bit.
8. Return to system view.
9. Enter Layer 2 Ethernet
or aggregate interface
view.
10. Configure the minimum
LSP interval and the
maximum number of
LSPs transmitted per
time.

Adjusting the SPF algorithm parameters

Based on the LSDB, an RB uses the SPF algorithm to calculate a shortest path tree with itself as the root.
The RB uses the shortest path tree to determine the next hop to a destination network. By adjusting the SFP
calculation intervals, you can prevent resource overconsumption when network changes are frequent.
When network changes are not frequent, the SPF calculation interval for continuous calculations is
reduced to minimum-interval. When the network changes are frequent, the SPF calculation interval is
added by incremental-interval × 2
time, but the SPF calculation interval cannot exceed maximum-interval.
To adjust SPF algorithm parameters:
Command
system-view
trill
timer lsp-max-age time
timer lsp-refresh time
lsp-length originate size
lsp-length receive size
set-overload [ timeout ]
quit
interface interface-type
interface-number
trill timer lsp interval [ count
count ]
(where n is the times of continuous SPF calculations triggered) each
n-2
12
Remarks
N/A
N/A
The default setting is 1200 seconds.
The default setting is 900 seconds.
The default setting is 1458 bytes.
The maximum length of an LSP originated
by an RB cannot be greater than the
maximum length of an LSP that can be
received by an RB. Otherwise, the system
displays error messages.
The default setting is 1492 bytes.
The maximum length of an LSP that can be
received by an RB cannot be smaller than
the maximum length of an LSP originated by
an RB. Otherwise, the system displays error
messages.
By default, the Overload bit is not set.
Do not set the Overload bit for LSPs sent by
the root bridge of a TRILL distribution tree.
Otherwise, the traffic to be forwarded
through the RB cannot be forwarded.
N/A
N/A
By default, the minimum LSP interval is 10
milliseconds, and the maximum number of
LSPs transmitted per time is 5.