[c-nsp] Port-channel weirdness VSS
Koen
k.vdh at solcon.nl
Tue Apr 13 06:09:36 EDT 2010
Hi,
We seem to have a issue with port-channel load-balancing between two
of our VSS instances. On both VSS sides we configured 8
interfaces to 1 port-channel.
At some point we see packetloss between servers connected to both VSS
instances when we put production traffic on it.
We have 4 physical connections connected from switch vss001a to switch
vss002a going through our MPLS core with an x-connect.
The same goes for the vss001b and vss002b.
PO22
vss001a VSS001 vss001b
| | | | | | | |
| | | | x-connects | | | |
| | | | | | | |
vss002a VSS002 vss002b
PO20
vss001 is running 12.2.33-SXH2a
vss002 is running 12.2.33-SXH5
I read somewhere on the cisco site that VSS doesn't want to send traffic
over the VSL link between the physical switches...
Should we configure 2 port-channels on both VSS instances with 4
member interfaces to solve this?
Thanks in advance,
Koen
----------------8<-----------8<---------------
Detailed Technical information:
VSS001 122-33.SXH2a
-------------------
interface Port-channel22
no switchport
ip address 10.32.7.49 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting access-violations
# all the members have the same configuration
interface GigabitEthernet1/4/39
no switchport
no ip address
speed 1000
duplex full
no cdp enable
spanning-tree portfast
channel-protocol lacp
channel-group 22 mode active
vss001#sh etherchannel 22 detail
Group state = L3
Ports: 8 Maxports = 16
Port-channels: 1 Max Port-channels = 16
Protocol: LACP
Minimum Links: 0
Ports in the group:
-------------------
Port: Gi1/4/39
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 3 Load = 0x44 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/4/39 SA bndl 32768 0x16 0x16 0x1428 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/4/39 SA bndl 32768 0x0 0x14 0x1902
0x3D
Age of the port in the current state: 3d:22h:22m:49s
Port: Gi1/4/40
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 0 Load = 0x03 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/4/40 SA bndl 32768 0x16 0x16 0x1429 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/4/40 SA bndl 32768 0x0 0x14 0x1903
0x3D
Age of the port in the current state: 3d:22h:22m:49s
Port: Gi1/4/41
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 2 Load = 0x88 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/4/41 SA bndl 32768 0x16 0x16 0x142A 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/4/41 SA bndl 32768 0x0 0x14 0x1904
0x3D
Age of the port in the current state: 3d:22h:22m:49s
Port: Gi1/4/42
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 1 Load = 0x30 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/4/42 SA bndl 32768 0x16 0x16 0x142B 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/4/42 SA bndl 32768 0x0 0x14 0x1905
0x3D
Age of the port in the current state: 3d:22h:22m:49s
Port: Gi2/4/39
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 4 Load = 0x60 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/4/39 SA bndl 32768 0x16 0x16 0x2428 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/4/39 SA bndl 32768 0x0 0x14 0x2902
0x3D
Age of the port in the current state: 0d:17h:11m:03s
Port: Gi2/4/40
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 5 Load = 0x11 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/4/40 SA bndl 32768 0x16 0x16 0x2429 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/4/40 SA bndl 32768 0x0 0x14 0x2903
0x3D
Age of the port in the current state: 0d:17h:05m:46s
Port: Gi2/4/41
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 7 Load = 0x0A Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/4/41 SA bndl 32768 0x16 0x16 0x242A 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/4/41 SA bndl 32768 0x0 0x14 0x2904
0x3D
Age of the port in the current state: 0d:17h:05m:43s
Port: Gi2/4/42
------------
Port state = Up Mstr In-Bndl
Channel group = 22 Mode = Active Gcchange = -
Port-channel = Po22 GC = - Pseudo port-channel = Po22
Port index = 6 Load = 0x84 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/4/42 SA bndl 32768 0x16 0x16 0x242B 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/4/42 SA bndl 32768 0x0 0x14 0x2905
0x3D
Age of the port in the current state: 0d:17h:11m:15s
Port-channels in the group:
----------------------
Port-channel: Po22 (Primary Aggregator)
------------
Age of the Port-channel = 3d:22h:24m:19s
Logical slot/port = 14/5 Number of ports = 8
HotStandBy port = null
Passive port list = Gi1/4/39 Gi1/4/40 Gi1/4/41 Gi1/4/42 Gi2/4/39 Gi2/4/40
Gi2/4/41 Gi2/4/42
Port state = Port-channel L3-Ag Ag-Inuse
Protocol = LACP
Fast-switchover = disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
3 44 Gi1/4/39 Active 2
0 03 Gi1/4/40 Active 2
2 88 Gi1/4/41 Active 2
1 30 Gi1/4/42 Active 2
4 60 Gi2/4/39 Active 2
5 11 Gi2/4/40 Active 2
7 0A Gi2/4/41 Active 2
6 84 Gi2/4/42 Active 2
Time since last port bundled: 0d:17h:05m:44s Gi2/4/41
Time since last port Un-bundled: 0d:17h:05m:50s Gi2/4/41
Last applied Hash Distribution Algorithm: Adaptive
VSS002 122-33.SXH5
------------------
interface Port-channel20
no switchport
ip address 10.32.7.50 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting access-violations
# all the members have the same configuration
interface GigabitEthernet1/9/1
no switchport
no ip address
speed 1000
duplex full
no cdp enable
spanning-tree portfast
channel-protocol lacp
channel-group 20 mode active
vss002#show etherchannel 20 detail
Group state = L3
Ports: 8 Maxports = 16
Port-channels: 1 Max Port-channels = 16
Protocol: LACP
Minimum Links: 0
Ports in the group:
-------------------
Port: Gi1/9/1
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 3 Load = 0x11 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/9/1 SA bndl 32768 0x14 0x14 0x1902 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/9/1 SA bndl 32768 0x0 0x16 0x1428
0x3D
Age of the port in the current state: 3d:22h:19m:43s
Port: Gi1/9/2
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 0 Load = 0x22 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/9/2 SA bndl 32768 0x14 0x14 0x1903 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/9/2 SA bndl 32768 0x0 0x16 0x1429
0x3D
Age of the port in the current state: 3d:22h:19m:52s
Port: Gi1/9/3
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 2 Load = 0x44 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/9/3 SA bndl 32768 0x14 0x14 0x1904 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/9/3 SA bndl 32768 0x0 0x16 0x142A
0x3D
Age of the port in the current state: 3d:22h:19m:50s
Port: Gi1/9/4
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 1 Load = 0x88 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi1/9/4 SA bndl 32768 0x14 0x14 0x1905 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi1/9/4 SA bndl 32768 0x0 0x16 0x142B
0x3D
Age of the port in the current state: 3d:22h:19m:52s
Port: Gi2/9/1
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 7 Load = 0x11 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/9/1 SA bndl 32768 0x14 0x14 0x2902 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/9/1 SA bndl 32768 0x0 0x16 0x2428
0x3D
Age of the port in the current state: 0d:17h:08m:06s
Port: Gi2/9/2
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 4 Load = 0x22 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/9/2 SA bndl 32768 0x14 0x14 0x2903 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/9/2 SA bndl 32768 0x0 0x16 0x2429
0x3D
Age of the port in the current state: 0d:17h:02m:52s
Port: Gi2/9/3
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 5 Load = 0x44 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/9/3 SA bndl 32768 0x14 0x14 0x2904 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/9/3 SA bndl 32768 0x0 0x16 0x242A
0x3D
Age of the port in the current state: 0d:17h:02m:47s
Port: Gi2/9/4
------------
Port state = Up Mstr In-Bndl
Channel group = 20 Mode = Active Gcchange = -
Port-channel = Po20 GC = - Pseudo port-channel = Po20
Port index = 6 Load = 0x88 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast
LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port
Port
Port Flags State Priority Key Key Number
State
Gi2/9/4 SA bndl 32768 0x14 0x14 0x2905 0x3D
Partner's information:
Partner Partner LACP Partner Partner Partner Partner
Partner
Port Flags State Port Priority Admin Key Oper Key Port Number
Port State
Gi2/9/4 SA bndl 32768 0x0 0x16 0x242B
0x3D
Age of the port in the current state: 0d:17h:08m:18s
Port-channels in the group:
----------------------
Port-channel: Po20 (Primary Aggregator)
------------
Age of the Port-channel = 13d:21h:35m:38s
Logical slot/port = 14/5 Number of ports = 8
HotStandBy port = null
Passive port list = Gi1/9/1 Gi1/9/2 Gi1/9/3 Gi1/9/4 Gi2/9/1 Gi2/9/2
Gi2/9/3 Gi2/9/4
Port state = Port-channel L3-Ag Ag-Inuse
Protocol = LACP
Fast-switchover = disabled
Load share deferral = disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
3 11 Gi1/9/1 Active 2
0 22 Gi1/9/2 Active 2
2 44 Gi1/9/3 Active 2
1 88 Gi1/9/4 Active 2
7 11 Gi2/9/1 Active 2
4 22 Gi2/9/2 Active 2
5 44 Gi2/9/3 Active 2
6 88 Gi2/9/4 Active 2
Time since last port bundled: 0d:17h:02m:49s Gi2/9/3
Time since last port Un-bundled: 0d:17h:02m:51s Gi2/9/3
Last applied Hash Distribution Algorithm: Fixed
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