The command for Arista switch
sh platform fm6000 counters interface et 1
will display a long list of debug counters. Is it possible to just display the counters I want, as if I were to use grep to just display the specific counter?
Absolutely, you can pipe to grep natively in EOS.
For example:
show platform fm6000 counters interface ethernet1 | grep IPv6
Ethernet1 valid IPv6 rx octets with unicast L2 DMACS 0
Ethernet1 valid IPv6 rx octets with broadcast L2 DMACS 0
Ethernet1 valid IPv6 rx octets with multicast L2 DMACS 0
Ethernet1 valid IPv6 rx pkts with unicast L2 DMACS 0
Ethernet1 valid IPv6 rx pkts with broadcast L2 DMACS 0
Ethernet1 valid IPv6 rx pkts with multicast L2 DMACS 0
Ethernet1 rx octets in valid IPv6 pets 0
Another useful tip would be using pipe to nz, as in "non-zero", so you do not see any line with counters that are only 0.
sh int count incoming | nz
Port InOctets InUcastPkts InMcastPkts InBcastPkts
Et7 946979594 0 131677 0
Et8 4208900 0 33307 4656
Et9 56549330 0 38990 4656
Et46 6302834 0 38464 13
Et47 4358450 0 23285 0
Et48 8870985 0 42911 0
Ma1 32218384 235583 29735 69495
Po733 13065988 0 80558 1