Comparing Common Layer 2 Configurations to Arista and Cisco
The configuration of layer 2 networking in Cumulus Linux (or any Linux distribution for that matter) is different from the incumbent network operating systems like Cisco's NX-OS or Arista's EOS. This article details some of the syntax differences using common layer 2 examples.
Configuring Trunks
Configuring trunks with two VLANs on ports 1 and 2:
| Cumulus Linux |
Cisco NX-OS |
Arista EOS |
auto bridge
iface bridge
bridge-vlan-aware yes
bridge-ports glob swp1-2
bridge-vids 100 200 |
vlan 100,200
interface ethernet 1/1
switchport mode trunk
interface ethernet 1/2
switchport mode trunk |
!
vlan 100,200
!
interface Ethernet1
switchport mode trunk
!
interface Ethernet2
switchport mode trunk |
Pruning a Trunk
Pruning VLAN 100 from the trunk on port 1:
| Cumulus Linux |
Cisco NX-OS |
Arista EOS |
auto bridge
iface bridge
bridge-vlan-aware yes
bridge-ports glob swp1-2
bridge-vids 100 200
auto swp1
iface swp1
bridge-vids 200 |
vlan 100,200
interface ethernet 1/1
switchport mode trunk
switchport trunk allowed vlan 200
interface ethernet 1/2
switchport mode trunk |
!
vlan 100,200
!
interface Ethernet1
switchport mode trunk
!
interface Ethernet2
switchport mode trunk
switchport trunk allowed vlan 200 |
Configuring Access Ports
Configuring two VLANs in access mode: port 1 VLAN 100 and port 2 VLAN 200:
| Cumulus Linux |
Cisco NX-OS |
Arista EOS |
auto bridge
iface bridge
bridge-vlan-aware yes
bridge-ports glob swp1-2
bridge-vids 100 200
auto swp1
iface swp1
bridge-access 100
auto swp2
iface swp2
bridge-access 200 |
vlan 100,200
interface ethernet 1/1
switchport mode access
switchport access vlan 100
interface ethernet 1/2
switchport mode access
switchport access vlan 200 |
!
vlan 100,200
!
interface Ethernet1
switchport access vlan 100
!
interface Ethernet2
switchport access vlan 200 |
Changing the Native (Untagged) VLAN for a Single Trunk
Setting the native VLAN to 100 on port 1 and 200 on port 2 when both ports are trunks allowing VLAN 1-200:
| Cumulus Linux |
Cisco NX-OS |
Arista EOS |
auto bridge
iface bridge
bridge-vlan-aware yes
bridge-ports glob swp1-2
bridge-vids 1-200
auto swp1
iface swp1
bridge-pvid 100
auto swp2
iface swp2
bridge-pvid 200 |
vlan 1-200
interface ethernet 1/1-2
switchport mode trunk
switchport trunk allowed vlan 1-200
interface ethernet 1/1
switchport trunk native vlan 100
interface ethernet 1/2
switchport trunk native vlan 200 |
!
vlan 1-200
!
interface Ethernet1
switchport mode trunk
switchport trunk native vlan 100
!
interface Ethernet2
switchport mode trunk
switchport trunk native vlan 200 |
See Also