Switching

Hi

Instead of using two core switches with VC setup, can I use one core switch say EX9208 with all redundancy in the same chassis (e.g. 2 SREs, 2 line cards for each required line card type)? If yes, what kind of protocols I need to run on the two intefraces that are going from the core switch to the same end server?

Yes, you can certainly use a physical chassis such as EX8200, EX9200, etc. to get redundancy in a single box.  You would run the exact same protocols as you would in a VC (typically a LAG with or without LACP), and in fact with Juniper switches the configuration looks almost exactly the same whether it is a physical or virtual-chassis.  There are some new protocols such as MC-LAG which can give even better redundancy when using two physical boxes by not tying the control-planes of the two switches together, but the physical chassis have very good internal redundancy and failover mechanisms.

Ron

one core switch is not a good decision. if you face any  problem with main chassis your system will be down completely. So two diffrent equipment or virtual chassis is better for redundancy

Thanks Hidayet for your reply, Could you plz advice what kind of failure
that could happen on one core switch if we have redundant
RE, redundant  interface line cards and redundant power supplies?

Deploying a fully-redundant chassis will circumvent 99% of most downtime issues based on any single hardware component failing, outside the catastrophic yet extremely rare backplane failure. For 100% redundancy networks deploy dual-routers(switch) with a fully redundant mesh, in which no single-link, component or even chassis can bring down your network.

Hi there,

In addition to that, Your fully redundant single chassis may experience outside issues like spot flooding (i.e. from burst overhead water pipe drenching that particular rack) or that particular chassis or rack overheating  (i.e. because someone did not clean the filters in time and chassis is sucking not enough air).

2 spatially redundant chassis - even in adjacent racks - is better than single chassis but obviously there is a cost/benefit analysis to be done in each particular case.

HTH

Thanks
Alex

Thanks Ron,