Switch Cisco 2960x Stacking cambio de rol master - member

Alonso16 — Sun, 04 Jul 2021 23:34:06 GMT

Saludos comunidad, espero estén muy bien. Un favor, Se tiene dos switch cisco WS-C2960XR-24TS-I en stacking, me podrian explicar el por que se puede presentar el escenario en en que el switch 2 miembro del stacking asuma el rol de master, sin un aparente baja de energia del switch 1.. les presento los siguientes comandos show y el log de enventos antes y despues de que ocurrio el cambio del rol master en el stacking (Ocasiono perdida de comunicación de los equipos en campo).

ANTES DEL CAMBIO DEL ROL MASTER AL SWITCH 2:

REFERENCIA DE SWITCH:

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 30 WS-C2960XR-24TS-I 15.2(7)E4 C2960X-UNIVERSALK9-M
2 30 WS-C2960XR-24TS-I 15.2(7)E4 C2960X-UNIVERSALK9-M

CONSUMO DE CPU:

322222222223333322222333332222222222222223333322222222223333
499999666663333366666111116666677777888887777788888555551111
100
90
80
70
60
50
40 *****
30 **********************************************************
20 **********************************************************
10 **********************************************************
0....5....1....1....2....2....3....3....4....4....5....5....6
0 5 0 5 0 5 0 5 0 5 0
CPU% per second (last 60 seconds)

333333333333333333333333335333333333333333333335543333333333
721100232212231315212222321511451211121532224121105344463945
100
90
80
70
60
50 * **
40 * * ** * * **** * *
30 ##########################################################
20 ##########################################################
10 ##########################################################
0....5....1....1....2....2....3....3....4....4....5....5....6
0 5 0 5 0 5 0 5 0 5 0
CPU% per minute (last 60 minutes)
* = maximum CPU% # = average CPU%

TEMPERATURA:

SW_MAIN_A#show env all
FAN PS-1 is OK
FAN PS-2 is OK
SYSTEM TEMPERATURE is OK
System Temperature Value: 39 Degree Celsius
System Temperature State: GREEN
Yellow Threshold : 67 Degree Celsius
Red Threshold : 75 Degree Celsius
POWER SUPPLY 2A TEMPERATURE: OK
POWER SUPPLY 2B TEMPERATURE: OK
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1A PWR-C2-250WAC LIT21414KN3 OK Good N/A 250/0
1B PWR-C2-250WAC LIT21414L9N OK Good N/A 250/0
2A PWR-C2-250WAC LIT21423C2J OK Good N/A 250/0
2B PWR-C2-250WAC LIT21433RKC OK Good N/A 250/0

MIEMBROS DEL STACKING

------------------ show switch detail ------------------

Switch/Stack Mac Address : b4a8.b94e.6900
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master b4a8.b94e.6900 15 4 Ready
2 Member b4a8.b94e.6380 1 4 Ready

Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Ok 2 2
2 Ok Ok 1 1

DESPUES QUE SE PRESENTO EL CAMBIO DEL ROL MASTER AL SWITCH MIEMBRO

LOG DE EVENTOS

Log Buffer (4096 bytes):
ASE SOFTWARE (fc2) (Switch-1)
Technical Support: http://www.cisco.com/techsupport (Switch-1)
Copyright (c) 1986-2021 by Cisco Systems, Inc. (Switch-1)
Compiled Mon 08-Mar-21 11:26 by prod_rel_team (Switch-1)
Jul 4 20:25:37.373: %PLATFORM-6-FLEXSTACK_INSERTED: FlexStack module inserted in Switch 1. (Switch-1)
Jul 4 20:25:37.747: %STACKMGR-5-MASTER_READY: Master Switch 2 is READY (Switch-1)
Jul 4 20:25:38.167: %STACKMGR-5-SWITCH_READY: Switch 1 is READY (Switch-1)
Jul 4 20:25:40.030: %PLATFORM_ENV-6-FRU_PS_OIR: FRU Power Supply 2 inserted (Switch-1)
Jul 4 20:25:42.256: %PNP-6-PNP_BEST_UDI_UPDATE: Best UDI [PID:WS-C2960XR-24TS-I,VID:V06,SN:FDO2144B0LA] identified via (platform-registry) (Switch-1)
Jul 4 20:25:42.256: %PNP-6-PNP_CDP_UPDATE: Device UDI [PID:WS-C2960XR-24TS-I,VID:V06,SN:FDO2144B0LA] identified for CDP (Switch-1)
Jul 4 20:25:42.260: %PNP-6-PNP_DISCOVERY_STOPPED: PnP Discovery stopped (Startup Config Present) (Switch-1)
Jul 4 20:25:44.448: %STACKMGR-5-SWITCH_READY: Switch 1 is READY
Jul 4 20:25:44.451: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
Jul 4 20:25:44.451: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Jul 4 20:25:44.388: %CFGMGR-4-SLAVE_WRITING_STARTUP_CFG: only master can do that (Switch-1)
Jul 4 20:25:44.388: %CFGMGR-4-SLAVE_WRITING_STARTUP_CFG: only master can do that (Switch-1)
Jul 4 20:25:46.237: %PHY-5-TRANSCEIVERINSERTED: Slot=1 Port=25: Transceiver has been inserted (SW_MAIN_A-1)
Jul 4 20:25:46.639: %USB_CONSOLE-6-MEDIA_RJ45: Console media-type is RJ45. (SW_MAIN_A-1)
Jul 4 20:25:46.639: %PHY-5-TRANSCEIVERINSERTED: Slot=1 Port=27: Transceiver has been inserted (SW_MAIN_A-1)
Jul 4 20:25:48.820: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/25, changed state to up
Jul 4 20:25:48.834: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/27, changed state to up
Jul 4 20:25:49.834: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/27, changed state to up
Jul 4 20:25:50.390: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
Jul 4 20:25:50.505: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:25:51.512: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:25:51.543: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/3, changed state to up
Jul 4 20:25:51.638: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to up
Jul 4 20:25:52.399: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
Jul 4 20:25:52.550: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/3, changed state to up
Jul 4 20:25:52.595: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF (SW_MAIN_A-1)
Jul 4 20:25:58.432: %REP-4-LINKSTATUS: GigabitEthernet1/0/1 (segment 1) is operational (SW_MAIN_A-1)
Jul 4 20:27:06.862: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:27:07.862: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:27:11.102: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:27:12.105: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:28:00.738: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:28:01.745: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:28:04.702: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:28:05.701: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:28:30.500: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:28:31.503: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to down
Jul 4 20:28:34.460: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/5, changed state to up
Jul 4 20:28:35.460: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/5, changed state to up

MIEMBROS DEL STACKING: En este comando se puede ver como ahora el nuevo master es el switch 2

SW_MAIN_A#show switch detail
Switch/Stack Mac Address : b4a8.b94e.6380
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
1 Member b4a8.b94e.6900 15 4 Ready
*2 Master b4a8.b94e.6380 1 4 Ready

Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Ok 2 2
2 Ok Ok 1 1

Quisiera saber las posibles causas de ese evento y si se podria volver a repetir, teniendo en consideración que el switch master actual tiene una prioridad de 1 y el miembro una prioridad de 15 (Anterior master stacking).
Una pregunta Adicional un consumo promedio y maximo de cpu tiene constantes picos de uso de 100%, esto podria ocasionar en un momento dado el reinicio del switch (No ocurre en el stacking).

Muchas gracias, por su ayuda.

Re: Switch Cisco 2960x Stacking cambio de rol master - member

Julio E. Moisa — Thu, 08 Jul 2021 00:02:43 GMT

Hola

Puede deberse a un bug, revisa que exista una version mas reciente del IOS y actualiza el stack.

Otra razon podria ser, aunque poco probable es que uno de los cables de stack no este correctamente conectado y tenga un falso.

Saludos

Re: Switch Cisco 2960x Stacking cambio de rol master - member

Hilda Arteaga — Thu, 22 Jul 2021 18:00:01 GMT

Gracias por la guía y asistencia @Julio E. Moisa

sujet Re: Switch Cisco 2960x Stacking cambio de rol master - member dans Discusiones Routing y Switching

Switch Cisco 2960x Stacking cambio de rol master - member

Re: Switch Cisco 2960x Stacking cambio de rol master - member

Re: Switch Cisco 2960x Stacking cambio de rol master - member