01-22-2020 06:56 AM
I have a Cisco 3850 48 port switch that is acting as our core switch.
Almost every Monday at 1am, ports 1-8 go down up down up.
I have searched for anything that could be possibly doing this to no avail.
The CAT 6 cables plugged into those 8 ports are all less than a meter long.
4 of the ports are access ports, the other 4 are trunk ports and none of them are part of a port-channel.
Any help is appreciated.
01-22-2020 07:01 AM
Can you post the configiuration, check is there any EEM Scripts running also ?
01-22-2020 07:26 AM
There does not seem to be anything in event manager and I have had the switch since it was new.
sho run
Current configuration : 16058 bytes
Last configuration change at 10:26:44 PST Tue Jan 21 2020 by admin
NVRAM config last updated at 08:49:18 PST Tue Jan 21 2020 by admin
version 15.0
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime
service password-encryption
service compress-config
service sequence-numbers
service unsupported-transceiver
hostname SANISI0-0_CORE_3850
boot-start-marker
boot-end-marker
vrf definition Mgmt-vrf
address-family ipv4
exit-address-family
address-family ipv6
exit-address-family
logging monitor critical
enable secret 4
enable password 7
username admin privilege 15 password 7
no aaa new-model
clock timezone PST -8 0
clock summer-time PDT recurring
switch 1 provision ws-c3850-48t
ip routing
ip domain-name XXXXXXX.com
ip name-server 8.8.8.8
ip device tracking
no ip igmp snooping
qos wireless-default-untrust
no errdisable detect cause gbic-invalid
no errdisable detect cause sfp-config-mismatch
diagnostic bootup level minimal
port-channel load-balance src-dst-mac
identity policy webauth-global-inactive
inactivity-timer 3600
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 1-35 priority 24576
redundancy
mode sso
ip ssh version 2
class-map match-any non-client-nrt-class
match non-client-nrt
policy-map port_child_policy
class non-client-nrt-class
bandwidth remaining ratio 10
interface Port-channel10
description xxx
switchport mode trunk
interface Port-channel20
description xxx
switchport trunk allowed vlan 1,20,25
switchport mode trunk
interface Port-channel30
description xxx
switchport trunk allowed vlan 1,20,23
switchport mode trunk
interface Port-channel40
description xxx
switchport trunk allowed vlan 1,10
switchport mode trunk
interface Port-channel50
description xxx
switchport trunk allowed vlan 1,23
switchport mode trunk
interface GigabitEthernet0/0
vrf forwarding Mgmt-vrf
no ip address
shutdown
negotiation auto
interface GigabitEthernet1/0/1
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/2
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/3
description xxx
switchport mode trunk
interface GigabitEthernet1/0/4
description xxx
switchport mode trunk
interface GigabitEthernet1/0/5
description xxx
switchport access vlan 25
switchport mode access
interface GigabitEthernet1/0/6
description xxx
switchport access vlan 25
switchport mode access
interface GigabitEthernet1/0/7
description xxx
switchport access vlan 310
switchport mode access
interface GigabitEthernet1/0/8
description xxx
switchport access vlan 310
switchport mode access
interface GigabitEthernet1/0/9
interface GigabitEthernet1/0/10
interface GigabitEthernet1/0/11
description xxx
switchport access vlan 25
switchport mode access
interface GigabitEthernet1/0/12
description xxx
switchport access vlan 25
switchport mode access
interface GigabitEthernet1/0/13
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/14
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/15
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/16
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/17
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/18
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/19
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/20
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/21
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/22
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/23
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/24
description xxx
switchport access vlan 400
switchport mode access
interface GigabitEthernet1/0/25
description xxx
switchport mode trunk
channel-protocol lacp
channel-group 10 mode active
interface GigabitEthernet1/0/26
description xxx
switchport mode trunk
channel-protocol lacp
channel-group 10 mode active
interface GigabitEthernet1/0/27
description xxx
switchport mode trunk
channel-protocol lacp
channel-group 10 mode active
interface GigabitEthernet1/0/28
description xxx
switchport mode trunk
channel-protocol lacp
channel-group 10 mode active
interface GigabitEthernet1/0/29
description xxx
switchport trunk allowed vlan 1,20,25
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet1/0/30
description xxx
switchport trunk allowed vlan 1,20,25
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet1/0/31
description xxx
switchport trunk allowed vlan 1,20,25
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet1/0/32
description xxx
switchport trunk allowed vlan 1,20,25
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet1/0/33
description xxx
switchport trunk allowed vlan 1,23
switchport mode trunk
channel-protocol lacp
channel-group 50 mode active
interface GigabitEthernet1/0/34
description xxx
switchport trunk allowed vlan 1,23
switchport mode trunk
channel-protocol lacp
channel-group 50 mode active
interface GigabitEthernet1/0/35
description xxx
switchport trunk allowed vlan 1,20,23
switchport mode trunk
channel-protocol lacp
channel-group 30 mode active
interface GigabitEthernet1/0/36
description xxx
switchport trunk allowed vlan 1,20,23
switchport mode trunk
channel-protocol lacp
channel-group 30 mode active
interface GigabitEthernet1/0/37
description xxx
switchport trunk allowed vlan 1,10
switchport mode trunk
channel-protocol lacp
channel-group 40 mode active
interface GigabitEthernet1/0/38
description xxx
switchport trunk allowed vlan 1,10
switchport mode trunk
channel-protocol lacp
channel-group 40 mode active
interface GigabitEthernet1/0/39
switchport access vlan 310
switchport mode access
channel-protocol lacp
interface GigabitEthernet1/0/40
interface GigabitEthernet1/0/41
description xxx
switchport trunk native vlan 26
switchport mode trunk
interface GigabitEthernet1/0/42
description xxx
switchport access vlan 26
switchport mode access
interface GigabitEthernet1/0/43
description xxx
switchport access vlan 26
switchport mode access
interface GigabitEthernet1/0/44
description xxx
switchport access vlan 26
switchport mode access
interface GigabitEthernet1/0/45
interface GigabitEthernet1/0/46
interface GigabitEthernet1/0/47
description xxx
switchport access vlan 310
switchport mode access
interface GigabitEthernet1/0/48
description xxx
switchport access vlan 31
switchport mode access
interface GigabitEthernet1/1/1
description xxx
switchport access vlan 300
switchport mode access
interface GigabitEthernet1/1/2
description xxx
switchport access vlan 300
switchport mode access
interface GigabitEthernet1/1/3
interface GigabitEthernet1/1/4
interface TenGigabitEthernet1/1/1
interface TenGigabitEthernet1/1/2
interface TenGigabitEthernet1/1/3
interface TenGigabitEthernet1/1/4
interface Vlan1
description xxx
ip address 10.21.108.2 255.255.254.0
interface Vlan10
description xxx
ip address 172.18.108.3 255.255.255.0
ip pim dense-mode
interface Vlan15
description xxx
no ip address
interface Vlan20
description xxx
no ip address
interface Vlan21
description xxx
no ip address
ip pim dense-mode
interface Vlan23
description xxx
ip address 172.23.108.2 255.255.255.0
ip helper-address 10.21.108.10
interface Vlan25
description xxx
ip address 172.28.108.251 255.255.254.0
ip helper-address 172.28.108.253
interface Vlan26
description xxx
ip address 172.26.108.2 255.255.255.0
interface Vlan31
description xxx
no ip address
interface Vlan35
description xxx
ip address 172.29.108.2 255.255.255.0
interface Vlan300
description xxx
ip address xxx
interface Vlan310
description xxx
ip address xxx
interface Vlan400
description xxx
ip address xxx
interface Vlan600
description xxx
no ip address
interface Vlan610
description xxx
no ip address
no ip http server
ip http authentication local
ip http secure-server
ip route 0.0.0.0 0.0.0.0 xxx
ip route 10.21.0.0 255.255.0.0 10.21.108.1
ip route 10.200.108.0 255.255.255.0 10.21.108.1
ip route 172.18.108.0 255.255.255.0 10.21.108.1
ip route 172.19.108.0 255.255.255.0 10.21.108.1
ip route 172.21.108.0 255.255.254.0 10.21.108.1
ip route 172.23.108.0 255.255.255.0 10.21.108.1
ip route 172.28.108.0 255.255.254.0 172.28.108.253
ip route 172.30.108.0 255.255.255.0 10.21.108.1
ip access-list extended SSH_Access
permit tcp 10.21.0.0 0.0.255.255 any range 22 telnet
permit udp 10.21.0.0 0.0.255.255 any range 22 23
deny udp any any range 22 23
deny tcp any any range 22 telnet
snmp-server community xxx
snmp-server location xxx
snmp-server contact xxx
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps flowmon
snmp-server enable traps transceiver all
snmp-server enable traps call-home message-send-fail server-fail
snmp-server enable traps rf
snmp-server enable traps memory
snmp-server enable traps cpu threshold
snmp-server enable traps tty
snmp-server enable traps auth-framework sec-violation
snmp-server enable traps flash insertion removal
snmp-server enable traps power-ethernet police
snmp-server enable traps vtp
snmp-server enable traps vlancreate
snmp-server enable traps vlandelete
snmp-server enable traps license
snmp-server enable traps envmon fan shutdown supply temperature status
snmp-server enable traps stackwise
snmp-server enable traps port-security
snmp-server enable traps fru-ctrl
snmp-server enable traps entity
snmp-server enable traps bgp
snmp-server enable traps cef resource-failure peer-state-change peer-fib-state-change inconsistency
snmp-server enable traps config-copy
snmp-server enable traps config
snmp-server enable traps config-ctid
snmp-server enable traps event-manager
snmp-server enable traps ipmulticast
snmp-server enable traps isis
snmp-server enable traps local-auth
snmp-server enable traps msdp
snmp-server enable traps pim neighbor-change rp-mapping-change invalid-pim-message
snmp-server enable traps vstack
snmp-server enable traps bridge newroot topologychange
snmp-server enable traps stpx inconsistency root-inconsistency loop-inconsistency
snmp-server enable traps syslog
snmp-server enable traps bulkstat collection transfer
snmp-server enable traps ipsla
snmp-server enable traps errdisable
snmp-server enable traps mac-notification change move threshold
snmp-server enable traps vlan-membership
snmp-server enable traps vrfmib vrf-up vrf-down vnet-trunk-up vnet-trunk-down
snmp-server host xxx
line con 0
password 7 xxx
login
stopbits 1
line aux 0
stopbits 1
line vty 0 4
access-class SSH_Access in
password 7 xxx
login local
line vty 5 15
access-class SSH_Access in
password 7 xxx
login local
ntp peer 1.pool.ntp.org
ntp peer 0.pool.ntp.org
01-22-2020 07:30 AM
- Activate syslogging on your platform , to a remote syslog server. Enable extensive debugging around the 'problem timeframe'. Same for snmp-trap logging to en external snmp trap receiver. Enable all possible snmp trap events. Configure ports with link/status logging enabled. And last but not least followup on the logs during normal production time-periods too and watch then for anomalies too, if any.
M.
01-22-2020 08:45 AM
I have done this and will monitor.
thank you.
01-22-2020 09:45 AM
Sure syslog is helpfull this kind of issue, which is unknown, make sure other switches also configured same way to log.
01-22-2020 12:46 PM
Hello,
what is the exact switch model ? Is this a PoE switch ?
01-22-2020 02:16 PM
@RadioGeek wrote:
Almost every Monday at 1am, ports 1-8 go down up down up.
Move to different ports and see if the problem follows.
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