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keshavraikot_31's avatar
keshavraikot_31
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May 31, 2017

MAC masquerade on F5 LTM

Can someone give me a more clarification about MAC masquerade on traffic group? How does it is different from per vlan configuration.when we configure floating mac on each vlan so f5 have floating mac-address for each vlan but When we have MAC masquerade configure based on traffic-group then LTM carry only one mac-address per traffic-group. Does LTM send a GARP request to neighbour switch? According to me, it has to send the garp request to neighbour switch but multiple article is saying that LTM will not send a garp request to neighbour switch.

 

Can you please tell me how would switch will come to know failover has occurred and now i have to send the traffic to other active device?

 

application delivery
LTM

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  • crodriguez's avatar
    crodriguez
    Ret. Employee
    Jun 02, 2017

    I don't know if you have seem this already, but there is a good response to a similar MAC masquerade question here: https://devcentral.f5.com/questions/how-does-mac-masquerading-work-exactly-50993

     

    MAC Masquerade applies to the traffic group. Yes, gARPs are still issued when a failover occurs but, as the article states, the effect is minimized since the MAC address itself does not change. MAC masquerade reduces the possibility that devices that are slower to respond to gARP will still try to send traffic to the device that failed.