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  • 1.  IP Helper Configurations

    Posted 05-08-2018 15:06

    Hi Experts,

    I need to convert IP helper configuration from a Cisco core switch to a Juniper EX9200 switch. Can you please confirm if this configuration is correct?

    VLAN 10 mapped to irb.10 and VLAN 20 mapped to irb.20.
    Cisco Config:

    Cisco SWITCH#sh run int vlan 10 | i helper
ip helper-address 10.10.50.100
Cisco SWITCH#sh run int vlan 20 | i helper
ip helper-address 10.10.100.100
Cisco SWITCH#

    Juniper config:

    set forwarding-options dhcp-relay server-group DHCP_Server_1 10.10.50.100
set forwarding-options dhcp-relay server-group DHCP_Server_2 10.10.100.100

set forwarding-options dhcp-relay group DHCP_Group_1 active-server-group DHCP_Server_1
set forwarding-options dhcp-relay group DHCP interface irb.10

set forwarding-options dhcp-relay group DHCP_Group_2 active-server-group DHCP_Server_2
set forwarding-options dhcp-relay group DHCP interface irb.20

     



  • 2.  RE: IP Helper Configurations
    Best Answer

     
    Posted 05-08-2018 18:58

    Yep that is correct



  • 3.  RE: IP Helper Configurations

    Posted 12-27-2023 10:28

    This is wrong from my point of view. The dhcp-relay group should have the same name for the active-server-group and the interface.

    set forwarding-options dhcp-relay group DHCP_Group_1 active-server-group DHCP_Server_1
set forwarding-options dhcp-relay group DHCP_Group_1 interface irb.10

set forwarding-options dhcp-relay group DHCP_Group_2 active-server-group DHCP_Server_2
set forwarding-options dhcp-relay group DHCP_Group_2 interface irb.20

    Greetings

    M



    ------------------------------
    MICHAEL BAST
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    Original Message