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C6800-16P10G-XL Throughput

Steev112
Level 1
Level 1

Hi,

I have two chassis 6500E switches using VSS feature, and used Sup-2T. we have installed two C6800-16P10G-XL modules in each chassis,

My questions are:

1. If I used all 10g ports on C6800-16P10G-XL, it will provide me 160G or 80G.

2. if I used Chassis 6807X with Sup-2T and utilized all 10G ports, it will provide me 160G or 80G.

Thanks

7 Replies 7

Leo Laohoo
Hall of Fame
Hall of Fame

1. If I used all 10g ports on C6800-16P10G-XL, it will provide me 160G or 80G.

80 Gbps.

2. if I used Chassis 6807X with Sup-2T and utilized all 10G ports, it will provide me 160G or 80G.

160 Gbps. 

Sup6T will be coming out soon (2016).  Sup2T can push up to 220 Gbps per slot.  Sup6T will push 440 Gbps.  

Actually C6800-16P10G would still provide 80Gbps in 6807-XL - C6800-32P10G would provide 160Gbps (sort of being two 16P10Gs stacked on top of each other).

http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6800-series-switches/datasheet-c78-733662.html

It says there "Backplane connection: 80-Gbps backplane bandwidth in Catalyst 6807-XL and 6500-E chassis" for 16P10G - not that Cisco's docs are always to be trusted, but I also found some presentation elsewhere describing the cards' internals (8 ports per 40G ASIC / fabric channel)...

Hi All,

It mentioned in the document "

The C6800 Family 16-port 10-Gigabit Ethernet Fiber Module provides up to 80 10-Gigabit Ethernet fiber ports in a single Cisco Catalyst 6807-XL Switch chassis, or up to 160 10-Gigabit Ethernet fiber ports in a Cisco Catalyst 6807-XL Virtual Switching System (VSS) 2T.

That mean each chassis will provide only 80G per slot since I enabled VSS it provide me 160G but it suppose provide me 160G per slot with VSS 320G? Correct me?

It also provides up to 176 10-Gigabit Ethernet Fiber ports in a single Cisco Catalyst 6513-E Switch chassis or up to 352 10-Gigabit Ethernet Fiber ports in a Cisco Catalyst 6500 Virtual Switching System (VSS) 2T."

I couldn't understand the above statement?

in the same time there is another document mentioned " Therefore, each Supervisor Engine 2T module in a Cisco Catalyst 6807-XL can support up to 220 Gbps per slot.

http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6807-xl-switch/white_paper_c11-728264.html

also there are  two modes performance and oversubscription, if it can provide me 160g no need for those modes?

here I am confusing :))

Thanks

Total number of ports is one thing (and it being different between VSS and non-VSS makes sense), bandwidth per slot is another (and there's no logical reason for it to differ between VSS and non-VSS setups).

SUP2T can manage 220 Gbps per slot, but there are also limitations on line cards (in terms of how much they can move to and from the backplane / fabric).

As understood Chassis C6807-Xl  with Sup-2t still will provide 80G per slot not 220G if I am using this module "16P10G-XL"

Thanks

Indeed.

However, it may be important to remember that it's 80G per slot to or from the backplane. That is, traffic entering one port and exiting another port in the same fabric channel may not be counted in those 80G, so that total traffic at a given point in time for all 16 ports may very well exceed 80G...

I couldn't find enough information about how exactly C6800 cards behave from this point of view, but it was pretty fun "arranging" ports on X6708 cards in order to maximize throughput according to card limitations and the way traffic flows in our network.

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