Project

General

Profile

How to configure Arista switches » History » Revision 13

Revision 12 (ll nu, 07/12/2019 09:02 PM) → Revision 13/15 (Nico Schottelius, 05/21/2020 05:02 PM)

h1. How to configure Arista switches 

 {{toc}} 

 h2. Saving your changes 

 If you don't enter write at the end, everything is lost after reboot. 

 <pre> 
 write 
 </pre> 

 h2. Entering conf mode 

 <pre> 
 enable 
 conf 
 </pre> 

 h2. Setting password 

 <pre> 
 username admin secret <passwordhere> 
 </pre> 

 

 h2. Setting name 

 <pre> 
 hostname <NAME> 
 </pre> 

 By default set it to *switch-placeX*. While the placeX part is indeed redundant, it is necessary to be able to distinguish switch1.place5 and switch1.place6. 


 h2. Creating a VLAN 

 <pre> 
 vlan <ID-OF-VLAN> 
 name <NAME-OF-VLAN> 
 </pre> 

 h2. Putting a port into a untagged vlan 

 <pre> 
 interface EthernetXX 
    switchport access vlan YY 
 </pre> 

 h2. Creating a port channel (= LACP = bonding) 

 * go to the interface that you want to be in the port-channel 
 * configure it 

 <pre> 
 interface EthernetXX 
    channel-group XX mode active 
 </pre> 

 h2. Creating a port channel over multiple switches using MLAG 

 <pre> 
 interface EthernetXX 
    channel-group XX mode active 
 interface port-channel XX 
    mlag XX 

 </pre> 

 And if you want to have tagged/trunk port: 

 <pre> 
    switchport mode trunk  
 </pre> 

 h2. Upgrading a switch 

 * copy the image from usb to flash 
 * change the boot config 
 * don't forget to write 
 * reload 

 <pre> 
 copy usb1:/EOS-4.14.4.swi flash:/EOS-4.14.4.swi 
 configure terminal 
 boot system flash:/EOS-4.14.4.swi 
 show boot-config 
 write 
 reload 
 </pre> 

 h2. Configuring MLAG 

 * Create a port channel for communication 
 * Configure the mlag over it 
 * Assuming the switches are connected by ethernet 47 and ethernet 48 
 * Assuming that the switches use vlan 13 
 * ZZ = ip suffix of the switch 
 * WW = ip suffix of the other switch 
 * mlagdomain = something local 


 <pre> 
 interface ethernet 47 
     channel-group 47 mode active 

 interface ethernet 48 
     channel-group 47 mode active 

 interface Port-Channel47 
    switchport mode trunk 
    switchport trunk group mlag-aristas 

 vlan 13 
    name mlag-aristas 
    trunk group mlag-aristas 

 interface Vlan13 
    no autostate 
    ip address 10.3.4.ZZ/24 


 mlag configuration 
    domain-id MLAGLOCALDOMAIN 
    peer-address 10.3.4.WW 
    local-interface Vlan13 
    peer-link Port-Channel47 


 </pre> 

 h2. Configuring BGP 

 * XX = ip suffix 

 <pre> 
 router bgp 209898 
    router-id 0.0.0.XX 
    bgp default ipv6-unicast 
    maximum-paths 4 
    bgp listen range 2a0a:e5c0:1:8::/64 peer-group ungleich remote-as 209898 
    neighbor ungleich peer-group 
    neighbor ungleich maximum-routes 12000  
 </pre>