get uplink interface

luqasz · Fri Jun 17, 2011 12:50 pm

hi

i want to get an uplink interface based on ip address of default route on bridged mikrotik.

i have solved this by doing:

:put [/interface bridge host get [find where mac-address=[/ip arp get [find where address=172.16.244.33] mac-address]] on-interface]

problems:
slower when more entries in bridge host table

:put [:time [/interface bridge host get [find mac-address=[/ip arp get [find address=[/ip route get [find dst-address=0.0.0.0/0] gateway]] mac-address]] on-interface]]
00:01:27.052851

interface bridge host print count-only 
434

if routerboard has less resources it works slower

system routerboard print 
       routerboard: yes
             model: "433"
     serial-number: "xxxxxxxxxxxx"
  current-firmware: "2.26"
  upgrade-firmware: "2.26"

i want to use output od this command in firewall rule.

do you have any better ideas ?

luqasz · Mon Jun 20, 2011 4:02 pm

found something that works much faster.

{
:local gw [/ip route get [find where dst-address=0.0.0.0/0] gateway];
:local mac [/ip arp get [find address=$gw] mac-address ];
:put [/interface bridge host get [find mac-address=$mac] on-interface ];  
}

and something really interesting:

:put [:typeof [/ip route get [find where dst-address=0.0.0.0/0] gateway]]
array

system resource print 
                   uptime: 4d3h46m23s
                  version: 5.4
              free-memory: 51208KiB
             total-memory: 62196KiB
                      cpu: MIPS 24Kc V7.4
                cpu-count: 1
            cpu-frequency: 300MHz
                 cpu-load: 1%
           free-hdd-space: 32128KiB
          total-hdd-space: 61440KiB
  write-sect-since-reboot: 241
         write-sect-total: 9808
               bad-blocks: 0%
        architecture-name: mipsbe
               board-name: RB433
                 platform: MikroTik

janisk · Mon Jun 20, 2011 4:23 pm

and something really interesting:
Code: Select all
:put [:typeof [/ip route get [find where dst-address=0.0.0.0/0] gateway]]
array

gateway can contain many entries, hence result is array. (think ECMP routes)

luqasz · Mon Jun 20, 2011 4:31 pm

ok thx for reply. my fault. thought it was a bug

get uplink interface

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