The Cisco Switching Small Business / SG main commands

 

Configuration

• Switch model : Cisco SG550X
• Switch model : Cisco SG350X
• Switch model : Cisco CBS250

Commands

Show

• Get firmware version:

Cisco# show version

• Get serial number:

Cisco# show system id

• Get model, uptime, hostname, MAC Address:

Cisco# show system unit 1

• Get mac address:

Cisco# show mac address-table

• Get gbic (sfp module) informations:

Cisco# show inventory

• Show last logs:

Cisco# show logging

• Show learned ip addresses:

Cisco# show arp

Misc

• Change password:

Cisco(config)# username cisco password myNEWpassword

• Add admin user:

Cisco(config)# username cisco privilege 15 password myNEWpassword

• Change hostname:

Cisco(config)# hostname Switch

• Save current config:

Switch# copy running-config startup-config Switch# write

• Set switch ip:

Switch(config)# interface vlan1 Switch(config-if)# ip address 192.168.1.100 255.255.255.0 Switch(config-if)# no ip address dhcp

• Set dns:

Switch(config)# ip name-server 192.168.1.110 Switch(config)# no ip domain lookup

• Add ip gateway:

Switch(config)# interface vlan1 Switch(config-if)# ip default-gateway 192.168.1.254

• Reboot:

Switch# reload

• Interface range (use gi1, gi2 etc… for CBS series):

Switch(config)# interface range ge1/0/4,ge1/0/30 Switch(config)# interface range ge1/0/4-18

• Enable ssh server:

Switch(config)# ip ssh server

• Disable http server:

Switch(config)# no ip http server

• Disable password maximum lifetime:

Switch(config)# password aging 0

• Disable Bonjour:

Switch(config)# no bonjour enable

• Disable PNP:

Switch(config)# no pnp enable

• Check cpu utilization:

Switch# show cpu utilization

• Globally disable the M#@!€*£cking auto smartport (port autoconfiguration) for CBS series:

Switch(config)# no macro auto

• Erase configuration, do a factory reset:

Switch(config)# delete startup-config

• Disable the logging of system messages and events to the console interface:

Switch(config)# no logging console

Import/Export Config

• Upload config to tftp server:

Switch# copy run tftp://tftp_server/YYYY-MM-DD

• Import config from tftp server:

Switch# copy tftp://tftp_server/YYYY-MM-DD run

Update Firmware

Easy method

• Upload new firmware:

Switch# boot system tftp://tftp_server/firmware.bin

• Reboot to load new firmware:

Switch# reload

Normal method

• Upload new firmware:

Switch# copy tftp://tftp_server/firmware.bin flash://system/images/

• Get available firmwares:

Switch# show bootvar

• Enable new firmware:

Switch# boot system image-2

• Reboot:

Switch# reload

PoE

• Turn off PoE:

Switch(config)# interface gi1/0/1 Switch(config-if)# no power inline

• Turn on PoE:

Switch(config)# interface gi1/0/1 Switch(config-if)# power inline auto

• Get PoE informations:

Switch# show power inline Switch# show power inline gi1/0/1

VLAN

• Add a VLAN:

Switch(config)# vlan database Switch(config-vlan)# vlan 4 Switch(config)# interface vlan 4 Switch(config-if)# name VoIP

• Set the access VLAN to an interface:

Switch(config)# interface GigabitEthernet 1/24 Switch(config-if)# switchport mode access Switch(config-if)# switchport access vlan4

• Configure the allowed VLAN to a Trunk interface:

Switch(config)# interface te 1/0/1 Switch(config-if)# switchport mode trunk Switch(config-if)# switchport trunk allowed vlan none Switch(config-if)# switchport trunk allowed vlan add 4,100,101,150

Locked Port / Disable port security

Message : Your port has port security enable and has noticed that the MAC address on that port is different from what the port had originally learned.

Switch# set interface active gi2/0/4 Switch# show ports security gi2/0/4 Switch(config) # interface gi2/0/4 Switch(config-if)# no port security

sFlow

• Set sFlow:

Switch(config)# sflow receiver <index of the receiver> <sflow receiver ip> port 2055 Switch(config)# interface range GigabitEthernet1/0/1-48 Switch(config-if-range)# sflow flow-sampling 1024 1 Switch(config-if-range)# sflow counters-sampling 600 1

• Disable sFlow:

Switch(config)# interface TengigabitEthernet1/0/1 Switch(config-if)# no sflow counters-sampling Switch(config-if)# no sflow flow-sampling

Port Mirroring / SPAN

• Set mirroring on GigabitEthernet1/0/1:

Switch(config)# monitor session 1 destination interface GigabitEthernet1/0/1

• With GigabitEthernet1/0/2 and GigabitEthernet1/0/3 traffic:

Switch(config)# monitor session 1 source interface GigabitEthernet1/0/2 both Switch(config)# monitor session 1 source interface GigabitEthernet1/0/3 both

NTP

• Show current time:

Switch# show clock

• Show ntp status:

Switch# show sntp status

• Set ntp (you should configure network access first):

Switch(config)# clock source sntp Switch(config)# sntp unicast client enable Switch(config)# sntp server 0.pool.ntp.org

Spanning Tree

• Show spanning tree configuration:

Switch# show spanning-tree

• Set current switch as root bridge:

Switch(config)# spanning-tree priority 4096

• Use RTSP (Rapid Spanning Tree Protocol) mode:

Switch(config)# spanning-tree mode rstp

Configure Stack

Stack two SG switches

Note: When stacking two SG switches, it's essential to ensure that both the models and firmware are the same.

Switch01

• Enter the context of Stack Unit 1:

Switch01(config)# stack unit 1

• Set the Unit ID to 1 (Master):

Switch01(unit)# stack configuration links te1-2 unit-id 1

• Save the configuration:

Switch01(unit)# do write

• Restart:

Switch01(unit)# do reload

Switch02

• Enter the context of Stack Unit 1:

Switch02(config)# stack unit 1

• Set the Unit ID to 2:

Switch02(unit)# stack configuration links te1-2 unit-id 2

• Save the configuration:

Switch02(unit)# do write

• Restart:

Switch02(unit)# do reload

Show commands

• Display the stack configuration:

Stack# show stack configuration Unit Id After Reboot Configuration Unit Id Stack Links -------- ------- --------------- 1 1 te1-2 2 2 te1-2

• Display the stack settings:

Stack# show stack Topology is Chain Units stack mode: Native Unit Id MAC Address Role Network Uplink Port Port Type Type ------- ------------------- ---------- ------- ------ 1 40:a6:e8:e6:9c:11 active gi te 2 40:a6:e8:e6:9c:12 standby gi te

• Display the stack information for an entire stack:

Stack# show stack links details Topology is Chain UNIT ID Link Status Speed Neighbor Neighbor Neighbor Unit ID Link MAC Address ------- -------- ---------- ----- -------- -------- ------------------- 1 te1 Active 10G 2 te2 40:a6:e8:e6:9c:12 1 te2 Active 10G 2 te1 40:a6:e8:e6:9c:12 2 te1 Active 10G 1 te2 40:a6:e8:e6:9c:11 2 te2 Active 10G 1 te1 40:a6:e8:e6:9c:11

Remove stack configuration

• Remove the stack configuration settings:

Switch01(config)# stack unit 1 Switch01(unit)# no stack configuration