Junos
Highlighted
Junos

Routing table for management traffic

a week ago

Hi, all,

 

I need help to understand how Junos behaves in this scenario, say I have two loopback addresses, lo0.0 (1.1.1.1/32) and lo0.1(2.2.2.2/32), lo0.0 is in default/master instance, lo0.1 is in its own routing instance, both IP addresses are accessible from a remote management station (say it is a snmp poller with IP address 10.10.10.10), i.e. both instances have valid routing entry for this management station IP. If I ping from 10.10.10.10 to 2.2.2.2, which next-hop (or which routing table) will Junos choose to send echo reply back to 10.10.10.10?

 

Thanks,

1 REPLY 1
Highlighted
Junos
Solution
Accepted by topic author oldcreek
a week ago

Re: Routing table for management traffic

a week ago

Hello,

 


@oldcreek wrote:

Hi, all,

 

If I ping from 10.10.10.10 to 2.2.2.2, which next-hop (or which routing table) will Junos choose to send echo reply back to 10.10.10.10?

 


 

JUNOS will choose the routing table associated with the instance where 2.2.2.2/lo0.1 belongs, or, in other words, where lo0.1 is inserted by means of "routing-instance BLAH interface lo0.1" line.

 

 

As for the next-hop, it will be determined by the route lookup in this table. If You configured route leaking between instances, it is possible that next-hop will be actually in GRT/inet.0.

 

HTH

Thx

Alex

 

 

 

_____________________________________________________________________

Please ask Your Juniper account team about Juniper Professional Services offerings.
Juniper PS can design, test & build the network/part of the network as per Your requirements

+++++++++++++++++++++++++++++++++++++++++++++

Accept as Solution = cool !
Accept as Solution+Kudo = You are a Star !
Feedback