Technical Tip: 0.0.0.0/0 on Route-Tag Objects

When 0.0.0.0/0 is received via BGP and the route-tag is applied:

get router info bgp network <--- Shows the BGP database.

Network Next Hop Metric LocPrf Weight RouteTag Path
* i0.0.0.0/0        10.100.72.2     0             100      0       44 ? <-/->

*>i10.0.0.0         10.100.72.1     20            200      0       44 ? <-/1>

*>i10.0.0.0/16      10.100.72.1     20            200      0       44 ? <-/1>

*>i10.0.10.0/24     10.100.72.83    20            100      0       44 ? <-/1>

*>i10.0.21.0/24     10.100.72.101   20            100      0       44 ? <-/1>

*>i10.0.31.0/25     10.100.72.64    20            100      0       44 ? <-/1>

* i10.0.255.208/29  10.100.72.87    2             100      0       44 ? <-/->

It will suppress the other routes. Therefore, on the output of the diagnose firewall route_tag list, only one route can be seen:

diagnose firewall route_tag list
list route tag info(vf(root)):
route tag address, route_tag(44) vrf_num(1):
vrf id(0), num(1): 0.0.0.0-255.255.255.255

The above output does not mean that the route tag will apply to all routes in the RIB or to none of them.
The address object will only be subject to the tagged routes (which can be verified via get router info bgp network).