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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