I finally decided to request full BGP tables from all of my ISPs, so I can easily change the preferred path to certain destinations.
However this meant that now I have to monitor both the state of the BGP sessions, but also the amount of routes that I receive from my neighbors.
Before my days with full BGP tables I relied on this simple alias:
alias bgp_states='birdc show protocols|awk "/^BIRD|bgp/{printf \"%20s\t%s\t%s\t%s\t%s\t%s\n\", \$1, \$2, \$3, \$4, \$5, \$6}"'
alias bgp_states='birdc show protocols|column -t|grep -E "^BIRD|bgp"'
The above alias(with its two implementations), worked like charm and produced:
root@sfgw:~# bgp_states BIRD 1.5.0 ready. bgp_itd_backup BGP main up 2016-02-16 Established bgp_evolink_main BGP main up 2016-02-16 Established bgp_evolink_backup BGP main up 2016-02-16 Established bgp_itd_main BGP main up 2016-02-16 Established bgp_telehouse_main BGP main up 18:08:55 Established bgp_telehouse_backup BGP main up 18:09:25 Established root@sfgw:~#
However, with full BGP tables, I needed a little bit more information. So I replaced the above aliases with this function:
function bgp_states {
for i in $(birdc show protocols|grep -E "^BIRD|bgp"|sed 's/\s\+/|/g'); do
a=( ${i//|/ })
echo ${a[*]}|awk '{printf "%-16s\t%s\t%s\t%s\t%s\t%s\n", $1, $2, $3, $4, $5, $6;}'
birdc show protocol all ${a[0]}|grep Routes
done
}
I was lazy and didn’t want to implement it properly with while read or IFS. Maybe I’ll have version two for this function, also.
So its results are a bit more informative:
root@sfgw:~# bgp_states BIRD 1.5.0 ready. bgp_itd_backup BGP main up 2016-02-16 Established Routes: 575148 imported, 1 exported, 20951 preferred bgp_evolink_main BGP main up 2016-02-16 Established Routes: 1 imported, 1 exported, 0 preferred bgp_evolink_backup BGP main up 2016-02-16 Established Routes: 1 imported, 1 exported, 0 preferred bgp_itd_main BGP main up 2016-02-16 Established Routes: 575148 imported, 1 exported, 0 preferred bgp_telehouse_main BGP main up 18:08:55 Established Routes: 575939 imported, 1 exported, 233100 preferred bgp_telehouse_backup BGP main up 18:09:25 Established Routes: 472013 imported, 1 exported, 324399 preferred root@sfgw:~#
