Config Example LAG between C3 stack and summit X450-g2 MLAG

  • 1
  • 1
  • Problem
  • Updated 2 years ago
  • Solved

Hello All


Does anyone have a good and stable config example for me to set up a lag of 4Gb (4x1Gb) between a C3 stack of 4 units and a MLag setup of 2 Summit X450-G2 switches?

The Mlag peering config of the X450-G2 is al ready running and stable,  but I'm struggling with setting up a stable LAG with the C3 stack.

tkx Rien

Photo of Rien Maurik

Rien Maurik

  • 260 Points 250 badge 2x thumb
  • confused

Posted 2 years ago

  • 1
  • 1
Photo of Patrick Voss

Patrick Voss, Alum

  • 11,594 Points 10k badge 2x thumb
Hello Rien,

Can you explain (or show) the problems you are running into? Assuming you are splitting the 4 ports to the MLAG peers you should be able to configure a 2 port lag on one x450 and another 2 port lag on the other. If you are configuring these lags for LACP both sides need to be configured.
Photo of Rien Maurik

Rien Maurik

  • 260 Points 250 badge 2x thumb

Hello Patrick

 

Thank you for your response 

Indeed are 2 of the connections configured a LAG on  one of the X450 and the other 2 on the other.

The used port on the X450 switches are 45-48 as ISC lag, and 1-2 for the uplink to the C3124-Stack

The used ports on the c3124-stack are ge.1.48;ge.2.48;ge.3.46;ge.4.48 as uplinks to the x450 switches

Patching is:

C3124 port ge.1.48 is connected to X450-g2-01 port 1

C3124 port ge.2.48 is connected to X450-g2-02 port 1

C3124 port ge.3.46 is connected to X450-g2-01 port 2

C3124 port ge.4.48 is connected to X450-g2-02 port 2

This's what I configured:

This is the Vlan, MLag and Lag config for switch X450-g2-01:

enable sharing 1 grouping 1-2 algorithm address-based L2 lacp

enable sharing 45 grouping 45-48 algorithm address-based L2 lacp

create vlan ISC

configure vlan ISC tag 4201

configure vlan ISC ipaddress 10.255.255.1/30

configure vlan ISC add port 45 tagged

configure vlan default add port 1,45 untagged

create vlan Wifi_AP

configure vlan Wifi_AP tag 10

configure vlan Wifi_AP add port 1,45 tagged

create vlan Voip_Siemens

configure vlan Voip_Siemens tag 20

configure vlan Voip_Siemens add port 1,45 tagged

create vlan Guest

configure vlan Guest tag 30

configure vlan Guest add port 1,45 tagged

create vlan Quarantine

configure vlan Quarantine tag 30

configure vlan Quarantine add port 1,45 tagged

create mlag peer X450-G2-02

configure mlag peer X450-G2-02  ipaddress 10.255.255.2 vr VR-Default

enable mlag port 1 peer X450-G2-02 id 1

This is the Vlan, MLag and Lag config for switch X450-g2-02:

enable sharing 1 grouping 1-2 algorithm address-based L2 lacp

enable sharing 45 grouping 45-48 algorithm address-based L2 lacp

create vlan ISC

configure vlan ISC tag 4201

configure vlan ISC ipaddress 10.255.255.2/30

configure vlan ISC add port 45 tagged

configure vlan default add port 1,45 untagged

create vlan Wifi_AP

configure vlan Wifi_AP tag 10

configure vlan Wifi_AP add port 1,45 tagged

create vlan Voip_Siemens

configure vlan Voip_Siemens tag 20

configure vlan Voip_Siemens add port 1,45 tagged

create vlan Guest

configure vlan Guest tag 30

configure vlan Guest add port 1,45 tagged

create vlan Quarantine

configure vlan Quarantine tag 30

configure vlan Quarantine add port 1,45 tagged

create mlag peer X450-G2-01

configure mlag peer X450-G2-01  ipaddress 10.255.255.1 vr VR-Default

enable mlag port 1 peer X450-G2-01 id 1

This is the Vlan and Lag config for C3124-stack-01 stack:

set vlan create 10

set vlan create 20

set vlan create 30

set vlan create 666

set vlan name 1 "Data"

set vlan name 10 "Wifi_AP"

set vlan name 20 "VoIP Siemens"

set vlan name 30 "Guests"

set vlan name 666 "Quarantine"

set vlan egress 1 ge.1.48; ge.2.48;ge.3.26;ge.4.48 untagged

set vlan egress 10 ge.1.48; ge.2.48;ge.3.26;ge.4.48 tagged

set vlan egress 20 ge.1.48; ge.2.48;ge.3.26;ge.4.48 tagged

set vlan egress 30 ge.1.48; ge.2.48;ge.3.26;ge.4.48 tagged

set vlan egress 666 ge.1.48; ge.2.48;ge.3.26;ge.4.48 tagged

set lacp static lag.0.3

set lacp aadminkey lag.0.2 3

set port lacp port ge.1.48 aadminkey 3

set port lacp port ge.2.48 aadminkey 3

set port lacp port ge.3.46 aadminkey 3

set port lacp port ge.4.48 aadminkey 3

set port lacp port ge.1.48 enable

set port lacp port ge.2.48 enable

set port lacp port ge.3.46 enable

set port lacp port ge.4.48 enable


The problems what I see is that the Lag/ MLag is coming up but when pinging from a PC on th ec3124 stack to the management addresses of x450 switches and a system connected to the X450 switch, the ping response is not stable, random it will lose IGMP response.

When I Use only one link between the C3124 stack and the X450 switch and no LAG or MLAG configuration, the pings are running fine.

I hope that you can help me

TKX Rien

Photo of Patrick Voss

Patrick Voss, Alum

  • 11,594 Points 10k badge 2x thumb
Hello Rien,

What happens when you keep MLAG enabled on both switches but take out the connections to one of the peers? Are you saying that the pings will not respond randomly? how often and how many?
Photo of Rien Maurik

Rien Maurik

  • 260 Points 250 badge 2x thumb

When I take  out the  uplinks on switch x450-g2-02, the uplink on the x45-g2-01 are both connected, the results where the same. The only stable config is one uplink and no LAG configure

the ping response where: 5  IGMP response, 5 not, 10 IGMP response, 2 not, 15 response, 1 not. There is no repeating order.

Photo of Patrick Voss

Patrick Voss, Alum

  • 11,594 Points 10k badge 2x thumb
Hello Rien,

What IP address are you pinging? and which switch? Will it have to cross the ISC to get to this IP? Can you send a "show vlan" from both x450G2?
Photo of Rien Maurik

Rien Maurik

  • 260 Points 250 badge 2x thumb

we are pinging the Ip address of the default vlan:

X450-g2-01 : 192.168.0.248/23

X450-g2-02: 192.168.0.249/23

I'm not on site of the customer, but I just did ask the customer to send me the config files

with part of the config do you need?


Photo of Jason Parker

Jason Parker, Employee

  • 3,018 Points 3k badge 2x thumb
Here is an example of a static lag on a C3
Note:
You can do this with one command and the command configures 6 commands

(su)->set lacp static lag.0.6 key 12345 ge.1.47-48


Issuing :
        set lacp static lag.0.6
        set lacp aadminkey lag.0.6 12345
        set port lacp port ge.1.47 aadminkey 12345
        set port lacp port ge.1.47 disable
        set port lacp port ge.1.48 aadminkey 12345
        set port lacp port ge.1.48 disable

Jason Parker
Photo of Erik Auerswald

Erik Auerswald, Embassador

  • 13,220 Points 10k badge 2x thumb
Hi,

the VLAN config for the C3 is missing the LAG port lag.0.2. It should look as follows:

set vlan egress 1 ge.1.48; ge.2.48;ge.3.26;ge.4.48;lag.0.2 untagged
set vlan egress 10 ge.1.48; ge.2.48;ge.3.26;ge.4.48;lag.0.2 tagged
set vlan egress 20 ge.1.48; ge.2.48;ge.3.26;ge.4.48;lag.0.2 tagged
set vlan egress 30 ge.1.48; ge.2.48;ge.3.26;ge.4.48;lag.0.2 tagged
set vlan egress 666 ge.1.48; ge.2.48;ge.3.26;ge.4.48;lag.0.2 tagged

You should verify the link aggregation function using "show sharing" on X450-G2 and "show port status lag.0.*" commands on the C3. On the C3, the physical ports have to show up as "dormant" in the "show port status" output.

You should verify the VLAN configuration for the LAG on the C3 using "show port egress lag.0.2".

HTH,
Erik Auerswald
Photo of Rien Maurik

Rien Maurik

  • 260 Points 250 badge 2x thumb

Hello Guys

Thank you all for your respons, your all where very helpfull

I will use the examples and will test the config next week.

tkx Rien  

Photo of Nico Lueck

Nico Lueck

  • 512 Points 500 badge 2x thumb
Hi,

do you have rstp or stp enabled on C3 Stack?

If yes you need to take out the LAG ports from rstp/stp.

Regards
Nico
Photo of Erik Auerswald

Erik Auerswald, Embassador

  • 13,058 Points 10k badge 2x thumb
As long as spanning tree is not enabled on the X450-G2s, STP config on the C3 should not be a problem.
Photo of Nico Lueck

Nico Lueck

  • 512 Points 500 badge 2x thumb
Some weeks ago I had a similar porblem and Extreme recommend not to have stp/rstp configured to the ports were MGLA/LAG is configured.
Photo of Erik Auerswald

Erik Auerswald, Embassador

  • 13,058 Points 10k badge 2x thumb
Since Extreme's MLAG does not interact with STP, that recommendation is sensible. The two MLAG peers use different bridge IDs when generating BPDUs.
The default settings on e.g. a Cisco IOS switch put a port-channel into err-disabled mode on receiving BPDUs with differing bridge IDs on different member ports of a port-channel. But this is only relevant if STP is enabled on the EXOS switches.

With only the C3 sending BPDUs out the LAG and the X450-G2 ignoring them, spanning tree on the C3 handles the LAG as an edge port.
Photo of Jason Parker

Jason Parker, Employee

  • 3,018 Points 3k badge 2x thumb
When using MLAG to a SecureStack you need to disable STP on the ports connected
Set spa breed portadmin ( ports of the lag)