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I have a theory question for you networking guru's if wouldn't mind answering :). Let's say I have a Cisco ASA 5510 who's cleartext throughput is 300Mbps and sitting behind that I have Citrix MPX 5650 who's throughput is 1Gbps - everything is connected to a 1Gbps Access swich. Will my load-balancer ever get to push 1Gbps of throughput if my FW only supports 300Mbps, but I'm on 1Gb access switches? The ASA has a 1Gb Interface, so I'm curious why have 1Gb interface if you can only process 300Mbps of throughput?

Firewall > Load Balancer > Web Servers
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1 Answer 1

up vote 1 down vote accepted

can't really run 300Mbps throughput over a 100Mbps connection :P
Also, you are limited to the weakest link (least throughput) when establishing a connection.

Say you have the following (this is for teaching not really real life):

      Host1   Host2
          /    \
      10mbps   100mbps
          \    /
            R1
            |
          1000mbps
            |
          Host3

List showing communications and max throughput

  • Host3 and Host1 = 10mbps
  • Host3 and Host2 = 100mbps
  • Host3 and R1 = 1000mbps
  • Host2 and Host1 = 10mbps
  • R1 and Host1 = 10mbps
  • R1 and Host2 = 100mpbs

So to answer your question, if the the application/server that is being accessed by the hosts has to go through the ASA, then yes the max throughput you'll get is 300mpbs.

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+1 for Nice diagram :). I'm not concerned with the host/server speed since it's all 1Gb. I'm more curious about the ASA to load-balancer –  RomeNYRR Jul 2 '13 at 22:57
    
If the throughput is only 300mbps max and your links are Gigabit, then your throughput will only be 300mpbs max. –  emynd Jul 3 '13 at 12:34
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