[j-nsp] Juniper M20 LACP oddness.

[Kevin Day]

Try tweaking your hash settings:

admin at core2-chi# show forwarding-options hash-key | display detail
##
## hash-key: Select data used in the hash key
##
##
## family: Protocol family
##
##
## inet: IPv4 protocol family
## alias: inet4
##
family inet {
     ##
     ## layer-3: Include Layer 3 (IP) data in the hash key
     ##
     layer-3 {
         ##
         ## Include IP destination address in the hash key
         ##
         destination-address;
         ##
         ## Include IP protocol in the hash key
         ##
         protocol;
         ##
         ## Include IP source address in the hash key
         ##
         source-address;
     }
}

http://juniper.cluepon.net/index.php/Load_Balancing



-- Kevin


On Apr 24, 2009, at 3:20 PM, Jonathan Call wrote:

>
> Has anyone encountered an issue where an etherchannel interface  
> appears to be only using a portion of its available bandwidth?
>
> I have a very straightforward LACP enabled etherchannel interface:
>
> chassis {
>    aggregated-devices {
>        ethernet {
>            device-count 4;
>        }
>    }
> }
>
>    ae0 {
>        aggregated-ether-options {
>            lacp {
>                active;
>            }
>        }
>        unit 0 {
>            family inet {
>                address x.x.x.x/30;
>            }
>            family inet6 {
>                address x:x:x::x/126;
>            }
>        }
>    }
>
>    ge-0/0/0 {
>        gigether-options {
>            802.3ad ae0;
>        }
>    }
>
>     ge-1/0/0 {
>
>        gigether-options {
>
>            802.3ad ae0;
>
>        }
>
>    }
>
>
> I have two other interfaces ge-2/0/0 and ge-3/0/0 that are also  
> configured but are not connected yet.
>
> Everything checks out ok:
>
> router>  show interfaces ae0
> Physical interface: ae0, Enabled, Physical link is Up
>  Interface index: 128, SNMP ifIndex: 35
>  Link-level type: Ethernet, MTU: 1514, Speed: 2000mbps, Loopback:  
> Disabled,
>  Source filtering: Disabled, Flow control: Disabled, Minimum links  
> needed: 1,
>  Minimum bandwidth needed: 0
>  ....
>
> router> show lacp interfaces ae0
> ggregated interface: ae0
>    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr   
> Timeout  Activity
>      ge-0/0/0       Actor    No    No   Yes  Yes  Yes   Yes      
> Fast    Active
>      ge-0/0/0     Partner    No    No   Yes  Yes  Yes   Yes      
> Slow    Active
>      ge-1/0/0       Actor    No    No   Yes  Yes  Yes   Yes      
> Fast    Active
>      ge-1/0/0     Partner    No    No   Yes  Yes  Yes   Yes      
> Slow    Active
>      ge-2/0/0       Actor    No   Yes    No   No   No   Yes      
> Fast    Active
>      ge-2/0/0     Partner    No   Yes    No   No   No   Yes      
> Fast   Passive
>      ge-3/0/0       Actor    No   Yes    No   No   No   Yes      
> Fast    Active
>      ge-3/0/0     Partner    No   Yes    No   No   No   Yes      
> Fast   Passive
>    LACP protocol:   Receive State    Transmit State           Mux  
> State
>      ge-0/0/0             Current     Slow periodic  Collecting  
> distributing
>      ge-1/0/0             Current     Slow periodic  Collecting  
> distributing
>      ge-2/0/0       Port disabled       No periodic             
> Detached
>      ge-3/0/0       Port disabled       No periodic             
> Detached
>
> When the network traffic for this ae0 interface reaches about 1Gbps  
> we begin to experience packet loss and other issues indicative of  
> link saturation. Our graphing also shows the link plateauing at the  
> 1Gbps level as well. Everything appears to be configured and  
> operating correctly but we do not appear to be able to cross the  
> 1Gbps threshold. This is a  Juniper M20 running JunOS 8.3R3.4
>
> Jonathan
>
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