EX Virtual Chassis Distance between members

[brian_juniper]

My customer wants to span his virtual chassis across two data centres 15 km apart. What is the maximum distance you can have between members of a virtual chassis?

[ip]

Brian,  I think its 40km,,,

[Sweet Salvadore]

According to the EX Virtual Chassis Best Practices Guide it is up to 50km.

http://kb.juniper.net/index?page=content&id=TN31&cat=SWITCHING&actp=LIST

[rnarang · Accepted solution]

Few lines from the Best practices guide regarding the Maximum Distance between members in Virtual chassis..

Interconnecting Members in a Virtual Chassis Configuration
A Virtual Chassis configuration consists of between two and 10 EX 4200 series switches connected together through Virtual Chassis ports. Configurations can range from a deployment in which each switch is physically collocated, to a deployment in which switches are separated by up to 70 km and connected via fiber optics. Each switch within a Virtual Chassis configuration is a member of that Virtual Chassis configuration.

http://www.juniper.net/solutions/literature/implementationguides/801018.pdf

[Sweet Salvadore]

It looks like there are multiple answers in the guides.  One says 50km while the other states 70km.  A Virtual Chassis can be created over the SFP/SFP+ ports up to the maximum transmission distance catered for by the SFP or SFP+ optic.

[bofh666ie]

ISTR reading somewhere that there must not be any MAC level devices (repeaters?) in the VC paths due to non-standard ethernet frames...

[ip]

are there latency caveats on this also..?  (apart from maxm optical distance)...

[JuniperKid]

There are no latency caveats involved.

Thanks.