I have a Juniper ex2300 switch in a mostly-cisco environment (no MIST). On my cisco devices, I have DHCP snooping configured per vlan, with option 82 disabled on the access-layer switches because they are bridging the traffic through another switch before reaching the DHCP relay.

To simplify the topology I'm looking at: At the access layer I have a L2 Juniper switch, which will be connected to a L2 Cisco distribution switch, connecting to the (cisco) DHCP relay.

Is it possible to enable a pure layer 2 version of DHCP snooping on a Juniper access switch using ELS, complete with disabling option 82? How would I go about this?

  • "Is it possible to enable a pure layer 2 version of DHCP snooping..." You may want to reword that because pure layer-2 has no concept of DHCP or even IP.
    – Ron Maupin
    Commented Apr 18, 2023 at 21:31
  • While very different from IOS, Juniper has extensive documentation. DHCP snooping is available on various versions / platforms for both ELS and non-ELS.
    – Ricky
    Commented Apr 19, 2023 at 4:22


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