Junos OS

Hi, I'm not sure about the difference between these types of routes. Could anyone clarify this for me? It would be great if someone gives an example using networks. 

 

Thank you

An aggregate route is a route you define but which is not used for forwarding traffic (next-hop is discard or reject).
Only if there are more specific routes (contributing routes) will the aggregate be active in the routing table and therefore available for use in the export policy.
root@SRX# set routing-options aggregate route 2.2.0.0/16
root@SRX> show route protocol aggregate detail
inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
2.2.0.0/16 (1 entry, 1 announced)
*Aggregate Preference: 130
Next hop type: Reject
Address: 0x11717f0
Next-hop reference count: 3
State:

From 'show route x.x.x.x' how can we tell if it is aggregate or generate routes?

 

Yes with the detail knob.

show route x.y.y.z  exact detail

Aggregate

Aggregate Preference: 130 <==== Both aggregate and generated routes will show the same here

 Next hop type: Reject <=== default always be reject for aggregate routes; can be configured discard

 

Generated 

Next hop type: Router, Next hop index: 546  <==== Will be type router

Next hop: x.y.y.t via ge-0/0/1.200, selected  <======Will have a valid next-hop- The presence of an IP tells you it is a generated route

#Acceptedsolution

Are we able to tell is this aggregate or generate route?

 

@kennethgoh wrote:

Are we able to tell is this aggregate or generate route? No.

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Please see the response I gave with the qualifier. I should have just said No.

 

"Yes with the "detail"  knob.

show route x.y.y.z  exact detail <=======With the "detail" knob!

The presence of IP address in next-hop confirms that is a generated route.