Date: Fri, 08 Apr 2011 12:29:50 +0200 From: Denny Schierz <linuxmail@4lin.net> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: FreeBSD-8.2: Channel Bounding: LACP or Roundrobin? With Cisco Catalyst Message-ID: <1302258590.3109.91.camel@pcdenny>
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hi,
I want to bound two e1000 (1Gb/s) channels and use at the moment LCAP,
but the max throughput is slower, than without channel bounding. I've
got round about 70MB/s instead of > 150MB/s - 200MB/s.
I used iperf with standard options:
:~$ iperf -f M -c 1.2.3.4
------------------------------------------------------------
Client connecting to 1.2.3.4, TCP port 5001
TCP window size: 0.02 MByte (default)
------------------------------------------------------------
[ 3] local 1.2.3.5 port 58637 connected with 1.2.3.4 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 705 MBytes 70.5 MBytes/sec
If a second PC do the same, than my 70MB/s splittet into ~30MB/s and
~40MB/s
config:
root@iscsihead-m:~# ifconfig lagg0
lagg0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
1500
options=3D219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_M=
AGIC>
ether 00:15:17:f1:5d:5f
inet6 fe80::215:17ff:fef1:5d5f%lagg0 prefixlen 64 scopeid 0x5=20
inet 1.2.3.4 netmask 0xffffffc0 broadcast 1.2.3.255
nd6 options=3D3<PERFORMNUD,ACCEPT_RTADV>
media: Ethernet autoselect
status: active
laggproto lacp
laggport: em1 flags=3D1c<ACTIVE,COLLECTING,DISTRIBUTING>
laggport: em0 flags=3D1c<ACTIVE,COLLECTING,DISTRIBUTING>
Config from the Cisco:
cisco#sh run int po3
Building configuration...
Current configuration : 119 bytes
!
interface Port-channel3
description iscsi-test
switchport
switchport access vlan 111
switchport mode access
end
#sh etherchannel summary=20
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: 3
Number of aggregators: 3
Group Port-channel Protocol Ports
------+-------------+-----------+------------------------------------------=
-----
1 Po1(SU) - Gi1/1(P) Gi1/2(P) =20
2 Po2(SU) - Gi6/17(P) Gi6/18(P) Gi6/19(P) =20
3 Po3(SU) LACP Gi5/41(P) Gi5/44(P) =20
cisco#sh run int gi5/41
Building configuration...
Current configuration : 182 bytes
!
interface GigabitEthernet5/41
description iscsi-head1
switchport access vlan 111
switchport mode access
no cdp enable
channel-group 3 mode active
spanning-tree portfast
end
#sh run int gi5/44
Building configuration...
Current configuration : 183 bytes
!
interface GigabitEthernet5/44
description GRAU1_iscsi2
switchport access vlan 111
switchport mode access
no cdp enable
channel-group 3 mode active
spanning-tree portfast
end
#sh etherchannel load-balance=20
EtherChannel Load-Balancing Configuration:
src-dst-mac
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source XOR Destination MAC address
IPv4: Source XOR Destination MAC address
IPv6: Source XOR Destination MAC address
What I saw with tcpdump: it seems, that only one device is used.
Maybe, Cisco uses mac and FreeBSD IP ?
Any suggestions?
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