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Create a loopback Interface

Create a loopback Interface

Chubak_Igor
New Contributor
Task Extreme?

Create a loopback Interface?
interface loopback 1
IP address 192.168.1.1 255.255.255.0

Create Interface vlan 101
IP address (loopback 1)

Interface vlan 102
IP address (loopback 1)

Interface vlan 103
IP address (loopback 1)

Example Cisco:
interface loopback 1
IP address 192.168.1.1 255.255.255.0
interface vlan 101
IP unnumbered loopback 1

Interface vlan 102
IP unnumbered loopback 1

Interface vlan 103
IP unnumbered loopback 1

11 REPLIES 11

Vladimir_Chukov
New Contributor

dflouret
Extreme Employee
Igor,

That's not possible. DHCP server only serves the vlan it belongs to. And each vlan has to have its own IP address.

Chubak_Igor
New Contributor
DHCP
server dhcp-pull 192.168.1.0/24 vlan 102
server dhcp-pull 192.168.2.0/24 vlan 103

vlan-102 120 subscribers
vlan-103 250 subscribers

I want to make
server dhcp-pull 192.168.1.0/23 vlan 101

create vlan "vlan101"
enable loopback-mode vlan vlan101
configure vlan vlan101 ipaddress 192.168.1.1 255.255.254.0
enable ipforwarding vlan vlan101

create vlan "vlan102"
configure vlan vlan102 tag 102
#use the ip address vlan 101
#cisco: ip unnumbered

create vlan "vlan103"
configure vlan vlan103 tag 103
#use the ip address vlan 101
#cisco: ip unnumbered

extreme???

dflouret
Extreme Employee
Igor,

Each vlan has to have its own ip address. If you want to have a loopback address for the whole switch then:
  • Select one of the vlans in the switch and enable loopback-mode
  • assign loopback ip address
  • assign ip addresses to all other vlans
  • enable ipforwarding in all vlans
If you want to have a loopback IP address that does not belong to any of the existing vlans, just create a vlan with no ports, enable loopback-mode and assign an ip address.

GTM-P2G8KFN