Switching

 View Only
last person joined: 3 days ago 

Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations.
  • 1.  difference b/w static Lag and dynamic lag

    Posted 05-30-2011 04:00

    Hi folks,

     

    can anyone help me in differentiation static lag and dynamic lag, please provide with the corroespoiding configuration commands also..tried to search but not able to differentiate on the basis of commands.

     

    Regards

     

    Dil mani



  • 2.  RE: difference b/w static Lag and dynamic lag
    Best Answer

    Posted 05-30-2011 07:54

    Hi,

    Static LAG is a bunch of links aggregated, which result into an aggregated aeX interface. No signaling takes place between two peers and therefore a misconfiguration on one side can be very harmful and difficult to troubleshoot(like links mismatch etc). The configuration in this cas is plain simple:

    }

    chassis {

    aggregated-devices {

    ethernet {

    device-count 1;

    }

    }

    }

    ge-0/0/10

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/11

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/12

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/13

    ether-options {

    802.3ad ae0

    }

    }

    ae0 {

    vlan-tagging;

    unit 0 {

    vlan-id 100;

    family inet {

    address 10.0.0.1/24 {

    vrrp-group 0 {

    virtual-address 10.0.0.4;

    priority 120;

    }

    }

    }

    }

     

    The dynamic LAG) uses LACP packets to establish association and therefore the missconfiguration probability is reduced (for example when links are boundled only on one device...). You have to keep in mind that at least one part should be configured as active.

     

    chassis {

    aggregated-devices {

    ethernet {

    device-count 1;

    }

    }

    }

    ge-0/0/10

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/11

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/12

    ether-options {

    802.3ad ae0

    }

    }

    ge-0/0/13

    ether-options {

    802.3ad ae0

    }

    }

    ae0 {

    ggregated-ether-options {

    lacp {

    active;

    }

    }

    vlan-tagging;

    unit 0 {

    vlan-id 100;

    family inet {

    address 10.0.0.1/24 {

    vrrp-group 0 {

    virtual-address 10.0.0.4;

    priority 120;

    }

    }

    }

    }



  • 3.  RE: difference b/w static Lag and dynamic lag

    Posted 05-30-2011 12:20

    dpapana is right in the sense that in LACP rist of misconfiguration is less...

     

    Moreover, in static LAG, failure of a link on participating switch will not be identified by its particiating neighbour. Whereas, in dynamic LAG, link failures are intelligently handled by the two participating device as LACP is adaptive / dynamic to these network failures.

     

    regards



  • 4.  RE: difference b/w static Lag and dynamic lag

    Posted 05-30-2011 21:19

    Thanx a lot Dumitru papana!!!