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Arista 3 - Demo

source

show interfaces

### EOS also has 'bash' command
### can run own linux services on top of it; like 'ntp', 'sflow' with some or no tweak

for HA redundant network design

  • 2 boxes MLAG (Multi-chassis Link AGgregation) together can coordinate and work together.
  • Leaf nodes can be MLAG pairs
  • Switches can be part of a group, then subgroups can be devided
## ssh to switch

## response of interface enabled with vmtracer
show vmtracer interface

show vmtracer vm

## can connect to a group of switches using 'session' command

## can create dynamic VLAN and assign VMs
Upgrading Switches in MLAG keeping machine online
  • Use MLAG stable switch-over to take out A-side or B-side of switch but maintain half-connectivity. The switches will boot with newer configuration and reconnect to MLAG domain
## to check s/w version
show version | grep software

## blow away serve config, to simulate what happens on connecting a new box straight from manufacturing
## forcing 'zero-touch provisioning'
write erase

## make the switch restart
reload power now

  • make sure command reload and similar are only available to restrictied users not group: all

  • when switch reboot in tasks like above it boots back in zero-touch provisioning mode

instead of booting up and connecting to a VLAN boot up, detect no config, put every interface as router interface then DHCP from every interface looking for boot script, continue till get response then download, provision and reload recommend using HTTP (instead of *FTP) HTTP lets push metadata, while pushing boot-scripts can also push data (like switch MAC address, serial number, OS, device type, LLDP - Link Layer Discovery Protocol neighbours)

  • can do awesome stuff with these boot-scripts with linux base

can put a curl to download extensions (OpenVPN client), make it connect to from it's management network to connect back to your operation center

Advanced Event Monitoring
  • every change gets logged in a rotating buffer
## current route set-up
show ip route

## show all routing changes that have gone in place
## may-be your neighbour adverised some route and withdrew it later
show event-monitor route

## event-monitor can be directly queries in it's sqlite interface
event-monitor interact