Etherchannel 6148

Unanswered Question
Mar 25th, 2010
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Hi


As i seen i ciso documentation regaring etherchannel in 6148 Line card limited to 1 Gig ASCI


One more query if I configure ether channel with 2 6148 Linecard for example

CAT 1                                                     CAT 2

Module 3 Port 1------------------------Module 3 Port 1

Module 4 Port 1------------------------Module 4 Port 1

Whether this Ether channel port group will have 2 Gig ASCI or still its 1 Gig Limitation

Thanks

Vinu



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Giuseppe Larosa Thu, 03/25/2010 - 05:54
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Hello Vinoth,

clearly on each switch two different ASICs are involved.


this is also a good design for redundancy should a linecard fail the other member link would be up.


The only way to be sure that the 1Gbps + 1 Gbps are available is to not use ports served by the same ASIC chips.


in your case the grouping should be of 6 ports (not 8 ports I did a mistake in the other thread there is a 8 Gbps link to shared bus)


you should leave unused and shut ports 3/2-6 and 4/2-6.


Hope to help

Giuseppe

vinoth.kumar Thu, 03/25/2010 - 06:21
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Thanks for your reply


so we will use the 3/1 and 4/1 shutdown the remaining port 3/2-8 and 4/2-8

which means we will get 2 gig bandwidth ASCI for Etherchannel


is it 8 Gbps link to shared bus i seen its 8 port X 6 slot = 6 Gig


and also i posted some details to packet drop the belwo details says there

is some packet drop in that port


am i right



6506-SW-A#$ interface gigabitEthernet 4/11 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/12 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/13 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/14 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/15 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/16 | include qos3Outlost

53. qos3Outlost = 837682147

6506-SW-A#$ interface gigabitEthernet 4/17 | include qos3Outlost

53. qos3Outlost = 14694

6506-SW-A#$ interface gigabitEthernet 4/18 | include qos3Outlost

53. qos3Outlost = 14694

6506-SW-A#$ interface gigabitEthernet 4/19 | include qos3Outlost

53. qos3Outlost = 14694

6506-SW-A#$ interface gigabitEthernet 4/20 | include qos3Outlost

53. qos3Outlost = 14694


Thanks

Vinu

On Thu, Mar 25, 2010 at 12:54 PM, giuslar <

Giuseppe Larosa Thu, 03/25/2010 - 06:38
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Hello Vinoth,


you are correct each ASIC handles 8 ports


>> On these modules there is a       single 1-Gigabit Ethernet uplink from the port ASIC that supports  eight ports.       These cards share a 1 Mb buffer between a group of ports (1-8, 9-16,  17-24,       25-32, 33-40, and 41-48)


as reported here

http://www.cisco.com/en/US//products/hw/switches/ps700/products_tech_note09186a00801751d7.shtml#ASIC


Hope to help

Giuseppe

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