[FROG] weird route-target config

[rendo]

Hi,

I am not sure if this is specific to cumulus or FRR in general,
It seems the route-target config for evpn (maybe for other family too) has
some magic if the 2 byte number has more than 3 digit.


I am adding a new vni 12345 with RT 64000:12345. The RT simply disappear

r1(config-router-af)# vni 12345
r1(config-router-af-vni)# rd 172.16.10.10:12345
r1(config-router-af-vni)# route-target both 64000:12345
r1(config-router-af-vni)#
r1(config-router-af-vni)# do sh run
Building configuration...

...

router bgp 64000
 address-family l2vpn evpn
  neighbor 10.7.0.3 activate
  neighbor 10.7.0.22 activate
*  vni 12345*
*   rd 172.16.10.10:12345 <http://172.16.10.10:12345>*
*  exit-vni*
  vni 31100
   rd 172.16.20.20:31100
   route-target import 64000:31100
   route-target export 64000:31100
  exit-vni
...


now i add "shorter" RT before putting the intended RT, both RT shows up

r1(config-router-af-vni)# route-target both 64000:12
r1(config-router-af-vni)# route-target both 64000:12345
r1(config-router-af-vni)# do sh run
...
  vni 12345
   rd 172.16.10.10:12345
*   route-target import 64000:12*
*   route-target import 64000:12345*
*   route-target export 64000:12*
*   route-target export 64000:12345*
  exit-vni
...


and if i delete the dummy RT, the intended RT still there

r1(config-router-af-vni)# no route-target export 64000:12
r1(config-router-af-vni)# no route-target import 64000:12
r1(config-router-af-vni)#
r1(config-router-af-vni)# do sh run
...
  vni 12345
   rd 172.16.10.10:12345
   route-target import 64000:12345
   route-target export 64000:12345
  exit-vni
....


could someone please take a look?

note: cumulus version is 3.5.3, FRR version is 3.2+cl3u4




thanks.

rendo
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