STP instance root secondary

Created: Dec 27, 2019 09:34:09Latest reply: Dec 27, 2019 09:34:26 87 1 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hello,everyone.

The configurations of the two switches are as follows:

sysname test_switch_2

vlan batch 372 400 418 423 426 3591

stp instance 0 root secondary

stp enable

undo http server enable

undo http secure-server enable

undo nap slave enable

dhcp enable

vlan 372

description O&M

vlan 400

description SERVICE

vlan 418

description SIGNALING

vlan 423

description CHARGING

vlan 426                                

description MEDIA

vlan 3591

description SERVICE UAG+ANTISPAMMING

#

<BOCEHUSWUAP1> dis curr

!Software Version V200R003C00SPC300

sysname test_switch_1

vlan batch 372 426 436 446

stp instance 1 root secondary

stp enable

undo http server enable

undo http secure-server enable

undo nap slave enable

acl number 4000

rule 1 permit l2-protocol 0x10b5

rule 2 permit l2-protocol 0x10b6

vlan 372

description O&M

vlan 426

description RTP

vlan 436

description UAPCTI

vlan 446                                

description UAPFS

Is it normal that both switches are root secondary switches?

Please help me! Thank you!


  • x
  • convention:

Featured Answers
DDSN
Admin Created Dec 27, 2019 09:34:26 Helpful(1) Helpful(1)

Hi, Qazik.
The stp instance 0 root secondary command is run on a switch.
The stp instance 1 root secondary command is run on the other node.
There is no conflict in essence. Even if the two switches are configured as instance 0 root secondary, the switch with the smaller MAC address wins. The stp instance x root secondary command is used to adjust the STP priority. In addition, the stp instance 1 root secondary command is meaningless because no VLAN is mapped to instance 1 on the switch.
  • x
  • convention:

All Answers
DDSN
DDSN Admin Created Dec 27, 2019 09:34:26 Helpful(1) Helpful(1)

Hi, Qazik.
The stp instance 0 root secondary command is run on a switch.
The stp instance 1 root secondary command is run on the other node.
There is no conflict in essence. Even if the two switches are configured as instance 0 root secondary, the switch with the smaller MAC address wins. The stp instance x root secondary command is used to adjust the STP priority. In addition, the stp instance 1 root secondary command is meaningless because no VLAN is mapped to instance 1 on the switch.
  • x
  • convention:

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