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 ] × 105

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:

Table 7: Values for VDP keepalive time

VDP keepalive exponent

Calculated value (seconds)

Result value (seconds)

14

4.75136

5

15

4.91520

5

16

5.24288

6

17

5.89824

6

18

7.20896

7

19

9.83040

10

20

15.07328

15

21

25.55904

26

22

46.530056

47

23

88.47360

89

24

172.35968

173

25

340.13184

341

26

675.67616

676

27

1346.7648

1347

28

2688.94208

2689

29

5373.29664

5374

30

10742.00576

10743

31

21479.424

21480

Examples

# Configure the VDP keepalive exponent on Ten-GigabitEthernet 1/0/1 as 23.

<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] 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