[j-nsp] Are IRB interfaces still not functional under SRX?

[Keegan Holley]

An IRB interface is logical so the member interfaces would have to consist of things that were already in the same layer-2 domain, such as a vlan sub interface.


On Apr 10, 2014, at 8:44 AM, Dave Humphrey <dave.humphrey at imtechict.co.uk> wrote:

> You can use an IRB to get layer 3 connectivity into a VPLS, which is quite
> useful.
> 
> On 06/04/2014 17:51, "Keegan Holley" <no.spam at comcast.net> wrote:
> 
>> I¹ve often wondered what the point of an IRB on an ethernet only platform
>> is.  In the olden days IRB/CRB interfaces were used to bridge TDM
>> interfaces into ethernet vlans to for the purposes of pure evil.  With
>> ethernet you can just add your physical interfaces to the same vlan.  I
>> suppose you could bridge two vlans together, but that¹s better done by
>> moving the physical interfaces.
>> 
>> I say this only to illustrate the fact that IRB¹s are different than
>> RVI¹s, but probably unnecessary on an ethernet only platform.
>> 
>> The newer feature guide makes no mention of IRB¹s.  I did find a page for
>> 10.2 which confirms old info.
>> 
>> http://www.juniper.net/techpubs/software/junos-security/junos-security10.2
>> /junos-srx-jseries-support-reference/jd0e5921.html
>> 
>> On Apr 5, 2014, at 2:32 PM, Morgan McLean <wrx230 at gmail.com> wrote:
>> 
>>> Klaus,
>>> 
>>> Yes its RVI on branch but its IRB on datacenter SRX; you can't even
>>> configure vlans on them.
>>> 
>>> Anyway, thanks all for the answers, just needed to verify I wasn't going
>>> crazy.
>>> 
>>> Thanks,
>>> Morgan
>>> 
>>> 
>>> On Sat, Apr 5, 2014 at 5:58 AM, Klaus Groeger <klauzi at gmail.com> wrote:
>>> 
>>>> On SRX branches one configures :
>>>> 
>>>> 
>>>> 
>>>> 
>>>> interfaces {
>>>> 
>>>>   vlan {
>>>> 
>>>>        unit 123 {
>>>> 
>>>>            family inet {
>>>> 
>>>>                       address 192.168.123.1/24
>>>> 
>>>>            }
>>>> 
>>>>        }
>>>> 
>>>>   }
>>>> 
>>>>   ge-0/0/0 {
>>>> 
>>>>         unit 0 {
>>>> 
>>>>            family ethernet-switching
>>>> 
>>>>                 vlan {
>>>> 
>>>>                      members 123
>>>> 
>>>>                  }
>>>> 
>>>>            }
>>>> 
>>>>        }
>>>> 
>>>>   }
>>>> 
>>>> }
>>>> 
>>>> 
>>>> 
>>>> 
>>>> vlan {
>>>> 
>>>>   onetwothree {
>>>> 
>>>>       vlan-id 123
>>>> 
>>>>       l3-interface vlan.123
>>>> 
>>>>   }
>>>> 
>>>> }
>>>> 
>>>> 
>>>> 
>>>> 
>>>> On SRX IRBs are called RVIs (Routed VLAN Interfaces). This way one gets
>>>> interfaces configured
>>>> 
>>>> as switching interfaces with a routable address. You may apply most L2
>>>> options in branch SRX as needed, even LAGs and all the other stuff.
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Regards,      Klaus
>>>> _______________________________________________
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>>>> 
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>> 
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