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Question

DHCP SERVER FOR EACH vlan ON SUMMIT X440-G2

  • 17 October 2019
  • 11 replies
  • 147 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.


11 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!!!

* ServersSwitchCanon.8 # show dhcp-server
VLAN "DSPH":-Stamping Mode:             None
    DHCP Address Range   : 10.1.90.2->10.1.91.254
    Netlogin Lease Timer : Not configured (Default = 10 seconds)
    DHCP Lease Timer     : 1600000 seconds
    Default Gateway      : 10.1.90.1
    Primary DNS Server   : 10.1.3.5
    WINS Server          : 10.1.3.5
    Ports DHCP Enabled   : 1

* ServersSwitchCanon.9 # show iparp port 1
VR            Destination      Mac                Age  Static  VLAN          VID   Port

Dynamic Entries  :         645             Static Entries            :          0
Pending Entries  :           0

ARP address check:    Enabled              ARP refresh               :    Enabled
Timeout          :          20 minutes     ARP Sender-Mac Learning   :   Disabled
Locktime         :        1000 milliseconds
Retransmit Time  :        1000 milliseconds
Reachable Time   :      900000 milliseconds (Auto)
Fast Convergence :         Off

ARP Global Settings
Max Entries         :    12288
Max Pending Entries :      256
Max Proxy Entries   :      256

ServersSwitchCanon.10 # show fdb port 1
MAC                                      VLAN Name( Tag)  Age  Flags          Port / Virtual Port List
------------------------------------------------------------------------------------------------------
70:5a:b6:47:05:9c                             DSPH(2222) 0029  d m            1

Flags : d - Dynamic, s - Static, p - Permanent, n - NetLogin, m - MAC, i - IP,
        x - IPX, l - lockdown MAC, L - lockdown-timeout MAC, M- Mirror, B - Egress Blackhole,
        b - Ingress Blackhole, v - MAC-Based VLAN, P - Private VLAN, T - VLAN translation,
        D - drop packet, h - Hardware Aging, o - IEEE 802.1ah Backbone MAC,
        S - Software Controlled Deletion, r - MSRP,
        X - VXLAN, Z - OpenFlow, E - EVPN

Total: 786 Static: 0  Perm: 0  Dyn: 786  Dropped: 0  Locked: 0  Locked with Timeout: 0
FDB Aging time: 300

 

 

Why won't my device get an address? tell me please people. I 'am very angry.:joy:

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