4Gb ports with Etherchannel connected to a Dell Server

[antoniocanasmartinez]

Hello,

I need to connect 4 physical ports of 1Gb of a 4500 switch to a dell server with team.

The thing is that is doesn't work, I tried to put traffic with the iperf and never goes more that 1Gb

Any suggest? Thanks!

the configuration below:

interface GigabitEthernet6/38
switchport access vlan 26
channel-group 3 mode active
spanning-tree portfast
end

(the same for the 4 ports)

!

interface Port-channel3
switchport
switchport access vlan 26
end

!

port-channel load-balance src-mac
interface Port-channel3
interface Port-channel4
channel-group 3 mode active
channel-group 3 mode active
channel-group 3 mode active
channel-group 3 mode active

!

ro.cpd.cr#      show etherchannel 3 summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        R - Layer3      S - Layer2
        U - in use      f - failed to allocate aggregator

        M - not in use, minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

Number of channel-groups in use: 2
Number of aggregators:           2

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
3      Po3(SU)         LACP      Gi6/38(P)   Gi7/12(P)   Gi7/45(P)
                                 Gi7/46(P)

ro.cpd.cr#show etherchannel load-balance
EtherChannel Load-Balancing Configuration:
        src-mac

EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source MAC address
  IPv4: Source MAC address
  IPv6: Source MAC address

[Amit Singh · Accepted solution]

How are you sending the traffic? From a PC connected to Cat4500 or you have iperf running on the Dell server?

What happens if that traffic goes beyond 1G, does it start dropping that packets? What kind of traffic are you pushing from iperf?

Cheers,

-amit singh

[antoniocanasmartinez]

I tried with 1, 2, 3, and even 4 laptops connected to the 4500 with 1gb access each.

If I use just one laptop it gets 950Mbps, if I use two, the same speed but among both laptops, with 3 or 4 exactly the same..

The iperf server is on the server, the laptops clients

I just need to know if the portchannel is really working with 4 Gb

[Amit Singh]

Have you tried changing the port-channel algorithm ideally to "source-desti mac" or " source ip/destination IP" . Just to make sure that when there is a new source/destination connection it is using a new available link. If you have the same source sending the traffic, ether-channel will always use the same ethernet link to forward the traffic.Please use " soruce-destination mac" to get the more granular mac bits for the right selection.

http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml#cat4k

Cheers,

-amit singh

[antoniocanasmartinez]

I changed it;

#sh run | inc port-channel
port-channel load-balance src-dst-mac

but it doesn't work, I got the same values with the iperf