[j-nsp] SRX Active/Active

Alexandre Guimaraes alexandre.guimaraes at ascenty.com
Sun Jun 26 16:58:21 EDT 2016

Here, we had lot of SRX equipments working as firewall services, you can use as routing platform, if u need too.

We had started using A/A mode, but times of times we face a lot of problems when the packet arrives at fw01-wan passing through fw1-lan, and return using fw2-lan. The firewall drop those packets until the rebalance or switchover the cluster/reth

The firewall concept, if something enter at interface wan1, have to go out using wan1.

There is a reth, I know, but this occurs and JTAC did not explain why until today.

Other worst thing was when the packet enters at fw2-lan, cross the data/control plane cluster links and go out at fw1-wan.

If you had 10gb ports at wan and lan, but the data/control links are 1g you will be shaped at 1g.

Our traffic are more than 3GBps, and all these traffic has ripped of.

Working with A/P, we never more experienced that painful days, so the tshoots are very better this way.

Also, Juniper recommends A/P because of those problem that I'd mentioned. Ask to your Juniper representative. 

Sorry if mistyped something, typing using mobile.


> Em 26 de jun de 2016, às 15:33, Brian Spade <bitkraft at gmail.com> escreveu:
> Hi Alexandre,
> On Sun, Jun 26, 2016 at 11:19 AM, Alexandre Guimaraes
> <alexandre.guimaraes at ascenty.com> wrote:
>> Brian,
>> Sorry about my cent, do not use active/active scenario.
>> My recomendation is active/backup
>> Att.
>> AŁexandre
> Ya, I'm thinking of going to A/P, but due to bandwidth requirements,
> we'd really like to use both ISP circuits at the same time.  I know we
> won't be able to achieve a perfect balance.  Are there particular
> reasons you recommend A/P over A/A?  I know some of the normal
> arguments, like it's harder to troubleshoot and perhaps harder on the
> firewalls.
> Thanks.
> /bs
>>> Em 26 de jun de 2016, às 15:16, Brian Spade <bitkraft at gmail.com> escreveu:
>>> Hi,
>>> I'm trying to figure out the best way to setup an SRX cluster as
>>> active/active.  I have attached a diagram of the topology, but it's a
>>> full mesh of links.  The ISP links are local interfaces and the
>>> southbound interfaces to the core routers are reth's.  Core1 is HSRP
>>> primary for all VLANs.  FW1 is primary for RG1 and FW2 is primary for
>>> RG2.  The IGP is OSPF but have many VRFs that are connected to the FW
>>> with transit VLANs to bind the sub-interface to virtual router & zone.
>>> The issue I have is Core2 has no active OSPF neighbors in this setup.
>>> Therefore, if Core1 fails, there will be a control outage as Core2
>>> establishes OSPF adjacencies.
>>> So I'm thinking it might be better to remove the reth's and use local
>>> interfaces on the FW/CORE links.  This way I can have a full mesh of
>>> OSPF adjacencies and no control plane loss when Core1 fails.
>>> Does anyone have thoughts on this or recommend the best way to achieve
>>> this active/active full mesh setup?  If there's good reason to not use
>>> active/active, I'd welcome the feedback.
>>> Thanks.
>>> /bs
>>> _______________________________________________
>>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/juniper-nsp

More information about the juniper-nsp mailing list