Monday, April 14, 2014

Discussion: Need Better 10 Gig Switch Solution

“I am looking for a switch solution that will connect 5 buildings together in a hub and spoke topology. We are using dark fiber to connect the buildings. I am looking for a switch that would have 2 SFP+ connections and 1 or 2 copper gig ports for the far end buildings. I also need a head end switch that would have 5 SFP+ ports and 1 or 2 copper gig ports. The connections will be layer 3 using OSPF or EIGRP between the buildings.”

“I have been looking at the 3750X and 3850X switches but really don't need all the copper ports. Any suggestions on what other switches are available that would do the job would be great.”

Need more info on this.  What you are asking if you want a core or distribution (aka distro) switch.  Can you tell me what switches you have at the far/remote end?

I mean the first thing that popped into my mind is the 6880X and 6800ia combo. The 6800ia is a "dumb" switch and needs a parent switch, in form of the 6880X or 6807X, to manage.

Another option would be the 4500X. This is a good option because you buy the additional ethernet modules you need.  Another option is the 4900M.

Be aware that the 4500X and the 4900M can do Layer 3 functions but not full MPLS.  They will only do VRF-lite.

The 6880X and 6807X will support full MPLS/VRF.

I guess the real question I have is what Cisco switch can do more than 4, SFP+ connections with some copper gig ports and still have layer 3 routing without going to a 4500X. Keeping the price somewhere in the 10,000.00 to 15,000.00 retail price range.

Hmmmmm ... How many SFP+ ports do you need? 3750X-12S or 3750X-24S can do up to two (2) SFP+. 

I was looking for 4 SFP+ ports. I found a 3850-48 that could have a total of 4 SFP+ ports. The 48copper ports are a little overkill but that would work.

It seems Cisco has a gap in its switch line for 10gig ports. To get 5 or more SFP+ ports you really don't have a choice other than multiple 3750X or 3850 switches or Nexus 2K or 4500X switches. 

It isn’t a gap.  It's by design.

No matter how many SFP+ ports a 3650 or 3850 the most basic question is this:  Can each switch really push a total of 40 Gbps?  The answer is no.

The later generation 3k switches specs generally have them as all wire-speed capable.  If you stack them, the stack, though, can become a bottleneck, especially with the 3650 series.
Are you concern buffering?  If so, I would agree.


To OP, realize there's differences between switches other than port speeds.  How data will transverse switch can be very important in selecting a switch.  For example, there's a reason 4948-10Gs are/were used in data centers and 3560X are not.  If you check their port bandwidths, fabric bandwidth, and device PPS capacity, they are about identical, and if you do a typical SmartBits tests, those results will likely be identical, but their real world capacity isn't identical.

Cisco 4500-X vs. Cisco 6800-X

Juniper EX4550
Cisco WS-C4500X


Example List prices
$19,000
(32 port 1/10G SFP+ model)
$28,000
(32-port 1/10G SFP+ model)
Bandwidth Gbps
960 Gbps
800 Gbps
Throughput Mpps
714 Mpps
250 Mpps
Max Stack/VC members
10
2
Max Bandwidth of stack
1.92 Tbps
1.6 Tbps
Port Densities
48 - 10G with expansion modules
400 - 10G in VC
40 - 10G with expansion modules
80 - 10G in VSS (Stack)

Starting off with the Cisco Catalyst 4500-X, this switch is available both 16 and 32 port versions with support for 10 Gigabit Ethernet (GbE) SFP and SFP+ interfaces.  Offering an 8-port 10GbE SFP+ removable uplink module, Cisco 4500-X switches can scale to up to 40 10GbE SFP/SFP+ ports.

When it comes to the Juniper EX4550 switch, this switch also offers 32 ports. However, the Juniper EX4550 can scale to 48 ports, which is 8 more ports than the Cisco 4500-X, by means of dual 8-port expansion modules. The Juniper EX4550 also offers both copper and fiber models, while the Cisco 4500-X only offers fiber compatibility.

The Cisco Catalyst 4500-X delivers up to 800 Gbps of switching capacity with up to 250 Mpps of throughput, and can scale up to 1.6Tbps with Virtual Switching System (VSS) technology. The Cisco 4500-X switch also offers Virtual Routing and Forwarding Lite (VRF-Lite) and Cisco Easy Virtual Networking (EVN) technologies.

Offering slightly better data rates and significantly better throughput than the Cisco 4500-X, the Juniper EX4550 offers 960 Gbps of switching capacity with up to 714 Mpps of throughput and can be scaled for up to 1.92 Tbps of switching capacity due to Juniper Virtual Chassis Technology. Juniper EX4550 switches also offer the advantage of the JUNOS OS, which we’ve previously found to have several advantages over the Cisco IOS.

More Cisco 4500-X and 6880 Series Switches:

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