evb vdp timer keepalive exponent
Use evb vdp timer keepalive exponent to configure a VDP keepalive exponent.
Use undo evb vdp timer keepalive exponent to restore the default.
Syntax
evb vdp timer keepalive exponent value
undo evb vdp timer keepalive exponent
Default
The VDP keepalive exponent is 20.
Views
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Predefined user roles
network-admin
Parameters
value: Specifies a VDP keepalive exponent in the range of 14 to 31.
Usage guidelines
The value for VDP keepalive time is expressed by the following equation:
VDP keepalive time (seconds) = 1.5 × [ 2VDP keepalive + (2 × ECP maximum retransmission time + 1) × 2ECP retransmission ] × 10—5
For detailed values, see Table 7.
Table 7 uses 3 and 16 (the defaults) as the ECP maximum retransmission time and the ECP retransmission exponent to calculate the VDP keepalive time. These two variables use the larger values proposed by the station and bridge through EVB TLV.
The network environment and configurations on the EVB bridge and station determine whether to use the defaults or the actual proposed values for the following ECP values:
ECP maximum retransmission time.
ECP retransmission exponent.
Table 7: Values for VDP keepalive time
VDP keepalive exponent | Calculated value (seconds) | Result value (seconds) |
|---|---|---|
14 | 7.12704 | 8 |
15 | 7.37280 | 8 |
16 | 7.86432 | 8 |
17 | 8.84736 | 9 |
18 | 10.81344 | 11 |
19 | 14.7456 | 15 |
20 | 22.60992 | 23 |
21 | 38.33856 | 39 |
22 | 69.795084 | 70 |
23 | 132.7104 | 133 |
24 | 258.53952 | 259 |
25 | 510.19776 | 511 |
26 | 1013.51424 | 1014 |
27 | 2020.1472 | 2021 |
28 | 4033.41312 | 4034 |
29 | 8059.94496 | 8060 |
30 | 16113.00864 | 16114 |
31 | 32219.136 | 32220 |
Examples
# Configure the VDP keepalive exponent on FortyGigE 1/0/1 as 23.
<Sysname> system-view [Sysname] interface FortyGigE 1/0/1 [Sysname-FortyGigE1/0/1] evb vdp timer keepalive exponent 23
# Configure the VDP keepalive exponent on Bridge-Aggregation 1 as 23.
<Sysname> system-view [Sysname] interface bridge-aggregation 1 [Sysname-Bridge-Aggregation1] evb vdp timer keepalive exponent 23