Pls find the config below of the stack switch on which we are observing the issue:
The only difference between this switch and other floor switches are stpd s0 is enabled on this switch:
software version: 15.1.5.4
configure snmp sysName "xyz"configure timezone name IST 330 noautodst
configure slot 1 module X460-48p
configure sys-recovery-level slot 1 reset
configure slot 2 module X460-48p
configure sys-recovery-level slot 2 reset
#
# Module vlan configuration.
#
configure vlan default delete ports all
configure vr VR-Default delete ports 1:1-54, 2:1-54
configure vr VR-Default add ports 1:1-54, 2:1-54
configure vlan default delete ports 1:1-54, 2:1-54
create vlan "NMS"
configure vlan NMS tag 40
create vlan "USER"
configure vlan USER tag 20
create vlan "VOICE"
configure vlan VOICE tag 10
configure ports 1:53 auto off speed 10000 duplex full
configure ports 1:54 auto off speed 10000 duplex full
configure ports 2:53 auto off speed 10000 duplex full
configure ports 2:54 auto off speed 10000 duplex full
configure vlan NMS add ports 1:53-54, 2:53-54 tagged
configure vlan USER add ports 1:53-54, 2:53-54 tagged
configure vlan USER add ports 1:1-44, 2:1-44 untagged
configure vlan VOICE add ports 1:1-48, 1:53-54, 2:1-48, 2:53-54 tagged
configure vlan Mgmt ipaddress 192.168.1.1 255.255.255.0
configure vlan NMS ipaddress 192.168.100.24 255.255.255.0
#
configure iproute add default 192.168.100.1
# Module elrp configuration.
#
enable elrp-client
configure elrp-client periodic NMS ports all interval 1 log-and-trap disable-port permanent
configure elrp-client periodic USER ports all interval 1 log-and-trap disable-port permanent
configure elrp-client periodic VOICE ports all interval 1 log-and-trap disable-port permanent
configure elrp-client disable-port exclude 1:53
configure elrp-client disable-port exclude 1:54
configure elrp-client disable-port exclude 2:53
configure elrp-client disable-port exclude 2:54
# Module lldp configuration.
# Module stp configuration.
configure mstp region 0204966ce708
configure stpd s0 delete vlan default ports all
disable stpd s0 auto-bind vlan default
create stpd STPD-NMS
configure stpd STPD-NMS mode dot1w
configure stpd STPD-NMS default-encapsulation pvst-plus
create stpd STPD-USER
configure stpd STPD-USER mode dot1w
configure stpd STPD-USER default-encapsulation pvst-plus
create stpd STPD-VOICE
configure stpd STPD-VOICE mode dot1w
configure stpd STPD-VOICE default-encapsulation pvst-plus
enable stpd STPD-NMS auto-bind vlan NMS
enable stpd STPD-USER auto-bind vlan USER
enable stpd STPD-VOICE auto-bind vlan VOICE
enable stpd s0
configure stpd STPD-NMS tag 40
enable stpd STPD-NMS
configure stpd STPD-USER tag 20
enable stpd STPD-USER
configure stpd STPD-VOICE tag 10
enable stpd STPD-VOICE
#
# Module telnetd configuration.
#