01-22-2012 02:00 AM - edited 03-07-2019 04:29 AM
As per my understanding 6509 all slots are dual channel, so 9 slot * 40 per slot (20 g in and 20 g out) = 360 GB
How cisco claim the 720 ?? What about the 6513 chassic switch fabric connection?
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01-22-2012 08:28 AM
Hello,
As I told above all the line cards and Supervisors in particular are different in FABRIC ASIC sub-modules. Your 10g line card has 2 fabric ASICs thus can use both fabric channels. Sup720 has only single fabric ASIC and can use only one channel.
Nik,
01-22-2012 04:28 AM
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Fabric bandwidths are normally quoted for the duplex capacity, so for the sup720 double your 360 and you get 720.
For the 6513, using a sup720, only the bottom 5 slots (9..13) are 40 Gbps, others are only 20. (NB: the 6500-E chassis actually supports 80 Gbps pers slot, including the 6513-E, which the sup2t can provide full bandwidth to all slots.)
6500 architecture is explained here: http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd80673385.html
01-22-2012 07:50 AM
SUP720 means swicth fabric BW 720, if i want to full 720GB bandwidth then i need slots with dual channel to switch fabric..is this correct?
Output of one of my 6509-E SUP720-3BXL chasis. If you see only one of my modual at stot 2 is having dual channel can i assume only this is giving me 40Gig switching.
XXXX#sh module
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 48 48-port 10/100/1000 RJ45 EtherModule WS-X6148A-GE-TX
2 4 CEF720 4 port 10-Gigabit Ethernet WS-X6704-10GE
3 6 Firewall Module WS-SVC-FWM-1
5 2 Supervisor Engine 720 (Hot) WS-SUP720-3BXL
6 2 Supervisor Engine 720 (Active) WS-SUP720-3BXL
9 48 48-port 10/100/1000 RJ45 EtherModule WS-X6148A-GE-TX
Mod Sub-Module Model
---- --------------------------- ------------------
2 Centralized Forwarding Card WS-F6700-CFC
5 Policy Feature Card 3 WS-F6K-PFC3BXL
5 MSFC3 Daughterboard WS-SUP720
6 Policy Feature Card 3 WS-F6K-PFC3BXL
6 MSFC3 Daughterboard WS-SUP720
xxx#sh fabric utilization
slot channel speed Ingress % Egress %
2 0 20G 0 0
2 1 20G 0 0
3 0 8G 0 0
5 0 20G 0 0
6 0 20G 1 0
01-22-2012 07:56 AM
Hello,
This is correct. Other thatn fabric capacity you also need to consider the line card specific. In your chassis you currnetly have both Fabric (WS-X6704-10GE ) and classic (WS-X6148A-GE-TX ) line cards. Last ones do not use fabric at all for switching. They exchange traffic through DBUS/RBUS with Supervisor thus those will not be able to get fabric capacity. SUP has only single channle and 10GB card has 2 fabric asic and can use both fabric channels.
Hope this helps,
Nik
01-22-2012 08:20 AM
01-22-2012 08:28 AM
Hello,
As I told above all the line cards and Supervisors in particular are different in FABRIC ASIC sub-modules. Your 10g line card has 2 fabric ASICs thus can use both fabric channels. Sup720 has only single fabric ASIC and can use only one channel.
Nik,
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