[j-nsp] Problems with Link Aggregation

[Sreepad Raj P S]

To achieve better load balancing, add more flows (in 100s or in 1000s)
and also lower the rate at which each flow is pumped.

sreepad | jncip-sp
cube 4.3.1.2.3 | xtn 10689
eabu-aa | juniper
exora | bangalore
"yearn > learn > earn"

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Filippo Cugini
Sent: Friday, March 08, 2013 12:34 AM
To: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Problems with Link Aggregation

Hi all,

thank you for the all the feedback, but unfortunately the problem is still present.

To test LAG, we generate traffic with a packet generator, with 5 different flows (one of 1Gbps and four of 100Mbps, each using different IP and subnetworks).


We added the per-packet load balancing, but nothing changes.

We have not been able to configure "forwarding-options hash", since it is not supported on EX3200 (at least with our Junos 10.4R4.7)


Just in case it may help, this is the show of lacp for ae0 on one side 
(the other side seems exactly the same)


Aggregated interface: ae0

LACP state:RoleExpDefDistColSynAggrTimeoutActivity

ge-0/0/12ActorNoNoYesYesYesYesFastActive

ge-0/0/12PartnerNoNoYesYesYesYesFastActive

ge-0/0/14ActorNoNoYesYesYesYesFastActive

ge-0/0/14PartnerNoNoYesYesYesYesFastActive

ge-0/0/16ActorNoNoYesYesYesYesFastActive

ge-0/0/16PartnerNoNoYesYesYesYesFastActive

LACP protocol:Receive StateTransmit StateMux State

ge-0/0/12CurrentFast periodic Collecting distributing

ge-0/0/14CurrentFast periodic Collecting distributing

ge-0/0/16CurrentFast periodic Collecting distributing


Thank you for any additional suggestion..
Best,
   Filippo




Il 07/03/2013 19.47, Dave Humphrey ha scritto:
> This is the key. The LAG will balance using flows, so one flow will only
> cross one link. If you add extra flows to your traffic using different
> source/destination IP addresses your traffic will balance out.
>
> On 06/03/2013 17:42, "Sreepad Raj P S" <pssraj at juniper.net> wrote:
>
>> How many flows are you sending?
>>
>> sreepad | jncip-sp
>> cube 4.3.1.2.3 | xtn 10689
>> eabu-aa | juniper
>> exora | bangalore
>> "yearn > learn > earn"
>>
>>
>> -----Original Message-----
>> From: juniper-nsp-bounces at puck.nether.net
>> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Filippo Cugini
>> Sent: Wednesday, March 06, 2013 7:46 PM
>> To: juniper-nsp at puck.nether.net
>> Cc: andrea.sgambelluri at libero.it
>> Subject: [j-nsp] Problems with Link Aggregation
>>
>> Hi,
>>
>> we configured the link-aggregation on two switches EX3200 with JUNOS
>> software 10.0R4.7.
>> We configured the aggregated interface (ae0), containing three ge
>> interfaces (ge-0/0/12, ge-0/0/14, ge-0/0/16).
>> At the operational level, the state of the aggregated interface (show
>> interfaces ae0 extensive) shows that the link is up at 3000mbps.
>>
>> However, when we send traffic on the aggregated link, just one ge works,
>> and we experience packet loss when we exceed the throughput of 1000mbps.
>> Indeed, the statistics of all interfaces show that only the ge-0/0/12 is
>> utilized to forward the data traffic, while the other two interfaces send
>> and receive only signaling packets.
>>
>> Any suggestions?
>>
>> This is our one-side configuration:
>>
>>
>> chassis {
>>      aggregated-devices {
>>          ethernet {
>>              device-count 1;
>>          }
>>      }
>> }
>>
>> interfaces {
>>      ge-0/0/12 {
>>          ether-options {
>>              802.3ad ae0;
>>          }
>>      }
>>      ge-0/0/14 {
>>          ether-options {
>>              802.3ad ae0;
>>          }
>>      }
>>      ge-0/0/16 {
>>          ether-options {
>>              802.3ad ae0;
>>          }
>>      }
>>
>> ...
>>
>>      ae0 {
>>          aggregated-ether-options {
>>              minimum-links 2;
>>              lacp {
>>                  active;
>>              }
>>          }
>>          unit 0 {
>>              family inet {
>> address 10.255.255.2/30;
>>              }
>>          }
>>      }
>>
>> }
>>
>>
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