Resolving an svi gateway address using arp

BaldMechanicBaldMechanic Posts: 8Member ■□□□□□□□□□
Guys I need help with this grey-area. I'm thinking... If an IP packet is to be routed from one VLAN to another using SVIs on a Layer 3 switch as default gateways, how does ARP work?


  • MickQMickQ Posts: 628Member ■■■■□□□□□□
    Off the top of my head, it'd use the MAC of the L3 device.
    This needs to be tested in a lab though. There's a reason for having labs and asking these questions folks!
  • ZartanasaurusZartanasaurus Posts: 2,008Member
    What part of the ARP process are you confused about in this scenario? Work it through your head hop by hop. Just because you're using an SVI instead of a physical port doesn't change how ARP works.
    Currently reading:
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  • BaldMechanicBaldMechanic Posts: 8Member ■□□□□□□□□□
    Thanks guys. Didn't realise that SVIs get assigned mac addresses just like physical interfaces. It's all sorted out now..
  • MickQMickQ Posts: 628Member ■■■■□□□□□□
    An SVI is a logical interface at L3; this still leaves a requirement for an L2 MAC.
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