# Networking Administration

# Switching

#### 3Com

Choosing which firmware to boot

verifying current versions:

> show version

setting next-active to the backup (before update) one:

> boot system backup

setting next-active to the active (most recent) one:

> boot system active

Reset to defaults:

[https://www.vmadmin.co.uk/networking/81-hp-3com/358-reset-3com-switch-to-factory-defaults-forgot-password](https://www.vmadmin.co.uk/networking/81-hp-3com/358-reset-3com-switch-to-factory-defaults-forgot-password)

#### Cisco

ACLs

Adding ACL example

360 permit tcp any 10.3.4.102 0.0.0.0 eq 8000

Removing last ACL

no 360

Global features

Filtering output

"COMMAND | i" or "COMMAND | include" will filter command output

example:

"switch1#show running-config | i trunk"

"switch1#show running-config | include trunk"

# Trunk between Cisco and Linux

**Cisco configuration**

```shell
interface GigabitEthernet0/11
switchport trunk allowed vlan 200,231
switchport mode trunk
switchport voice vlan 280
spanning-tree portfast
end
```

**Kali Linux configuration**

/etc/networking/interfaces

```shell
interface GigabitEthernet0/11
switchport trunk allowed vlan 200,231
switchport mode trunk
switchport voice vlan 280
spanning-tree portfast
end
```

Kali Linux configuration