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denis_fr

22 Posts

109105

June 21st, 2012 02:00

Aggregate links between 2 stacking 6224 and one 2848

Hello,
 

I want to aggregate two physical Ethernet links between 2  stacking Dell PowerConnect 6224 and one 2848.
 


Is it possible, knowing that the 2848 uses the standard 802.3ad but does not LACP support ?
 

I have good load balancing, and fault tolerance ?
 

 

Thank you for your help :emotion-4:
 

denis_fr
22 Posts
June 27th, 2012 02:00
Hi Daniel !
 

So I will not have a problem with the 2848 to group links ?
 

Because I hesitated with the 5548 that supports LACP.
 

Thanks
denis_fr
22 Posts
August 7th, 2012 03:00
Hello !
 

I created a lag between a 2848 and two 6224.
 

But when at work, I have mounted latency.
 

I wondered, should we change the load balance on the 2848 :
 

 
 

And "hash algorithm type" on the 6224 :
 

 
 

 

Thank ;)
denis_fr
22 Posts
August 7th, 2012 09:00
On 2848, I installed the latest version 1.0.0.44.
 

On 6224, I also installed the latest 3.3.3.3.
 

Here is a diagram with high latency (~ 150 ms + redundancy) :
 


 

 
 


 

Here is a diagram without a high latency (~ 1 ms + no redundancy) :
 

 

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Here is the configuration of 6224 :
 

!Current Configuration:
!System Description "PowerConnect 6224, 3.3.3.3, VxWorks 6.5"
!System Software Version 3.3.3.3
!Cut-through mode is configured as disabled
!
configure
vlan database
vlan 2-6
vlan routing 2 1
vlan routing 6 2
vlan routing 3 3
vlan routing 5 4
vlan routing 4 5
exit
ip telnet server disable
snmp-server location "xxxxx"
snmp-server contact "xxxxxx"
hostname "SW-6224-STACK"
stack
member 1 1
member 2 1
exit
switch 1 priority 1
switch 2 priority 2
ip address 192.168.1.1 255.255.255.0
ip domain-name xxxxxxx.xx
ip name-server 10.0.0.235
ip name-server 10.0.0.236
ip routing
ip route 0.0.0.0 0.0.0.0 192.168.6.2
arp 10.0.0.237 03BF.0A00.00ED
interface vlan 2
name "Serveurs"
routing
ip address 10.0.0.1 255.255.255.0
exit
interface vlan 3
name "Utilisateurs"
routing
ip address 192.168.3.1 255.255.255.0
ip helper-address 10.0.0.235
exit
interface vlan 4
name "Informatique"
routing
ip address 192.168.4.1 255.255.255.0
ip helper-address 10.0.0.235
exit
interface vlan 5
name "Imprimantes"
routing
ip address 192.168.5.1 255.255.255.0
exit
interface vlan 6
name "CDR vers FW"
routing
ip address 192.168.6.1 255.255.255.248
exit
username "xxxx" password xxxxx level 15 encrypted
ip ssh server
!
interface ethernet 1/g1
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g2
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g3
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g4
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g5
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g6
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g7
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g8
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g9
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g10
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g11
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g12
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g13
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g14
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g15
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g16
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g17
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g18
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g19
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g20
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 1/g21
channel-group 1 mode on
description 'Port trunk vers SW-2848-1'
exit
!
interface ethernet 1/g22
channel-group 2 mode on
description 'Port trunk vers SW-2848-2'
exit
!
interface ethernet 1/g23
channel-group 3 mode on
description 'Port untagged vers FW'
exit
!
interface ethernet 1/g24
channel-group 3 mode on
description 'Port untagged vers FW'
exit
!
interface ethernet 2/g1
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g2
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g3
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g4
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g5
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g6
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g7
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g8
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g9
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g10
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g11
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g12
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g13
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g14
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g15
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g16
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g17
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g18
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g19
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g20
spanning-tree portfast
switchport access vlan 2
exit
!
interface ethernet 2/g21
channel-group 1 mode on
description 'Port trunk vers SW-2848-1'
exit
!
interface ethernet 2/g22
channel-group 2 mode on
description 'Port trunk vers SW-2848-2'
exit
!
interface ethernet 2/g23
channel-group 3 mode on
description 'Port untagged vers FW'
exit
!
interface ethernet 2/g24
channel-group 3 mode on
description 'Port untagged vers FW'
exit
!
interface port-channel 1
description 'Liaison SW-6224-STACK vers SW-2848-1'
switchport mode general
switchport general allowed vlan add 2-6 tagged
exit
!
interface port-channel 2
description 'Liaison SW-6224-STACK vers SW-2848-2'
switchport mode general
switchport general allowed vlan add 2-6 tagged
exit
!
interface port-channel 3
description 'Liaison SW-6224-STACK vers FW'
switchport access vlan 6
exit
exit




























































































































































































































































































































 

 

Thank for your help ! :emotion-11:
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

denis_fr
22 Posts
August 8th, 2012 01:00
Hello Daniel.
 

I could not put the port-channel 1 and 2 in "auto" (with LACP) since PowerConnect 2848 does not support LACP.
 

I have to put them "on" (without LACP) ?
 

When I connect the two hard links of each "port-channel" 1 and 2. But it works for a period of time before the network goes (ping loss, high latency ...).
 

If I do a "show interface port-channel 1" :
 

 

 

Channel   Ports                         Hash Algorithm Type
 

-------   ----------------------------- -------------------
ch1       Active: 1/g21 2/g21     3
 

 

If I do a "show interface port-channel 2" :
 


 

Channel   Ports                         Hash Algorithm Type
-------   ----------------------------- -------------------
ch2       Active: 1/g22 2/g22     3
 

 

Here is the return of the command "show spanning-tree summary":
 


 

SW-6224-STACK#show spanning-tree summary
 


Spanning Tree Adminmode........... Enabled
Spanning Tree Version............. IEEE 802.1w
BPDU Guard Mode................... Disabled
BPDU Flood Mode................... Disabled

Portfast BPDU filtering :....... Disabled
Configuration Name................ D0-67-E5-7D-A3-FE
Configuration Revision Level...... 0
Configuration Digest Key.......... 0xac36177f50283cd4b83821d8ab26de62
Configuration Format Selector..... 0
 

 

 

I understand nothing, STP should not do so, since I do not have a loop, or it considers port-channel as loops ?
 


 

Thank you Daniel.
 

 

 

 

 


tomaszg
39 Posts
August 8th, 2012 12:00
We had issuses with switches running RSTP, when some Netgear switches do not support it, and also STP was not enabled. It created loop over whole network, 3000 pkts/sec broadcast suppersion was not enough.
tomaszg
39 Posts
August 8th, 2012 12:00
I'll probably go with RSTP anyway.
 

Or MSTP if VLANs are needed and both switches suppor it.
Alfredo-AnR
1 Message
February 10th, 2014 10:00
Hi,
 

I have designed the same network you have, using other vendor equipment no issues.  But I am noticing the same issue here with 2848 and 6224 core stacked.
 

 

I have LAG, mode on on the 6224 and enabled on the 2848, it works for some time really well, then there are large amounts of packet loss that starts randomly and high latency, it stops when I disable one of the LAG ports on the 6224.
 

 

I have the 6224 setup at RSTP root bridge (priority 0) and I am using 32bit cost types on all switches...
 

 

It seems like a bug in the switches... I need help please...
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