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Question

DHCP SERVER FOR EACH vlan ON SUMMIT X440-G2

  • 17 October 2019
  • 10 replies
  • 125 views

Hi colleagues, the question is, can I make a DHCP server on Summit x440-g2-24t-10ge. I try but cannot. I want my own DHCP server for each VLAN. Tell me please.


10 replies

Userlevel 6

Hello!

 

You can configure it - https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-the-DHCP-server-on-a-VLAN-in-EXOS/?q=exos+dhcp&l=en_US&fs=Search&pn=1

But there is recommendation to use external DHCP server. 

Better used switch with DHCP server as a temporary solution.

 

Thank you!

 

I know that . but i ts not work! maybe reboot?

Userlevel 6

Could you show #sh dhcp-s ?

It’s have to be like that:

# sh dhcp-server "test"
VLAN "test":
    DHCP Address Range   : 172.16.0.50->172.16.0.100
    Netlogin Lease Timer : Not configured (Default = 10 seconds)
    DHCP Lease Timer     : Not configured (Default = 7200 seconds)
    Ports DHCP Enabled   : 1-10

 

Thank you!

 

 

Userlevel 6

Is there possibility that another DHCP server exist in vlan video2?

Because you have your dhcp poll 10.1.80.2 - 10.1.81.254 and client (in #show iparp) receive address 10.1.7.88.

 

Thank you!

 

There is no other DHCP in this vlan. the device received this address when it was in another vlan. This is a local test vlan on a single switch.

Userlevel 6
  • does ports 20-22 tagged or untagged in vlan 80?
  • what is client device “Rubezh”? (I mean device with tagged or untagged ports?)
  • vlan 80 ipaddress is configured with what mask?
  • could you try to configure dhcp pool based on /24 mask

Thank you!

device untagged

i need 23 mask

Userlevel 6

From my lab - normally working.

 # sh sw

SysName:          X440-48t

 # show "test"
VLAN Interface with name test created by user
    Admin State:         Enabled     Tagging:   802.1Q Tag 80
….
    Primary IP:          10.1.80.1/23
…..
    Ports:   2.           (Number of active ports=1)
       Untag:      28,    *48

 

 # show dhcp-server
VLAN "test":
    DHCP Address Range   : 10.1.80.2->10.1.81.254
    Netlogin Lease Timer : Not configured (Default = 10 seconds)
    DHCP Lease Timer     : Not configured (Default = 7200 seconds)
    Default Gateway      : 10.1.80.1
    Ports DHCP Enabled   : 28,48

    ===========================================================================
    IP                MAC                 State      Lease Time Left
    ===========================================================================
          10.1.80.2   00:26:22:c3:bd:88   Assigned   0001:59:06

 

 # show iparp te
VR            Destination      Mac                Age  Static  VLAN          VID   Port
VR-Default    10.1.80.2        00:26:22:c3:bd:88    0      NO  test          80    48

 

Thank you!

dot work!!!

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