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EOS to XOS - Lag setup


So about to replace all the Enterasys's in our network.

In the old EOS configurations, the lag's have been added to each of the VLAN's. in setting up the new XOS switches, is this best practice? From my understanding most of the port setup is stripped when creating the LAG?? We have 3 LAG's in one switch associated with particular VLAN's.

Thx

6 replies

Hi Dave,

You only add VLANs to the link aggregation group (LAG) when you need it.
Yes, some of the port config (e.g. STP) in the master port will be lost when LAG is enabled. Always reference the master logical port of the load-sharing group when configuring or viewing VLANs.
so previously when adding a LAG to a VLAN the below was used:
set vlan egress 100 lag.0.1 tagged

so just the Master Port of the chosen LAG to add to the VLAN.
configure vlan 100 1:1 tagged

Thx.

Sorry for noob questions, new to playing with switches 🙂
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Dave wrote:

so previously when adding a LAG to a VLAN the below was used:
set vlan egress 100 lag.0.1 tagged

so just the Master Port of the chosen LAG to add to the VLAN.
configure vlan 100 1:1 tagged

Thx.

Sorry for noob questions, new to playing with switches 🙂
[/code]

Hi Dave,

If you want to add VLAN 100 to your LAG, here is what you need:

configure vlan 100 add ports 1:1 tagged

note: port 1:1 is your master port in the LAG
Userlevel 2
Hi Dave,

The vlan membership of LAG always follow the membership of master port. That means, if there are three vlans already added to the master port, when you create a LAG, those three vlans will be added to LAG. Here is the example:

==== Three Vlans have been added to a normal port ====

* L7:U33.32 # sh port 1 info detPort: 1
Virtual-router: VR-Default
Type: UTP
Random Early drop: Unsupported
Admin state: Enabled with auto-speed sensing auto-duplex
Link State: Ready
Link Ups: 0 Last: --
Link Downs: 0 Last: --

VLAN cfg:
Name: V0801C, 802.1Q Tag = 801, MAC-limit = No-limit, Virtual router: VR-Default
Name: V2510D, 802.1Q Tag = 2510, MAC-limit = No-limit, Virtual router: VR-Default
Name: VLAN_100, 802.1Q Tag = 100, MAC-limit = No-limit, Virtual router: VR-Default
STP cfg:
STPD_01(enable), Tag=0801, Mode=EMISTP, State=DISABLED

Protocol:
Trunking: Load sharing is not enabled.

=== After enable LAG ===

* L7:U33.33 # enable sharing 1 grouping 1-2 lacp
Warning: STP port (1) is lost due to port is deleted from VLAN.
Warning: Any config on the master port is lost (STP, IGMP Filter, IGMP Static Group, MAC-Security, CFM, etc.)

* L7:U33.34 # sh sharing Load Sharing Monitor
Config Current Agg Ld Share Ld Share Agg Link Link Up
Master Master Control Algorithm Group Mbr State Transitions
==============================================================================
1 LACP L2 1 - R 0
L2 2 - R 0
==============================================================================
Link State: A-Active, D-Disabled, R-Ready, NP-Port not present, L-Loopback
Load Sharing Algorithm: (L2) Layer 2 address based, (L3) Layer 3 address based
(L3_L4) Layer 3 address and Layer 4 port based
(custom) User-selected address-based configuration
Custom Algorithm Configuration: ipv4 L3-and-L4, xor
Number of load sharing trunks: 1

==== LAG has been added to those three vlans ===

* L7:U33.35 # sh port 1 info detPort: 1
Virtual-router: VR-Default
Type: UTP
Random Early drop: Unsupported
Admin state: Enabled with auto-speed sensing auto-duplex
Link State: Ready
Link Ups: 0 Last: --
Link Downs: 0 Last: --

VLAN cfg:
Name: V0801C, 802.1Q Tag = 801, MAC-limit = No-limit, Virtual router: VR-Default
Name: V2510D, 802.1Q Tag = 2510, MAC-limit = No-limit, Virtual router: VR-Default
Name: VLAN_100, 802.1Q Tag = 100, MAC-limit = No-limit, Virtual router: VR-Default
STP cfg:
STPD_01(enable), Tag=0801, Mode=EMISTP, State=DISABLED

Protocol:
Trunking: Master port with 2 members using algorithm address based - L2
algorithm
Members: 1-2
Userlevel 2
For the second "show port 1 info det", you can see that port 1 has been added to LAG and is the master port. You can check it in:

Protocol:
Trunking: Master port with 2 members using algorithm address based - L2
algorithm
Members: 1-2
thanks guys

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