1

EX3300 can not use irb.x,

I have a Juniper EX4300 convergence layer Switch, in it there are irb interfaces. such as irb.3, and if I have another EX4300 for access layer, I can set vlan l3-interface irb.3 without create irb.3 in the second access layer switch.

but now the second switch is a EX3300 device, I can not set vlan3's l3-interface to irb.3, only can set vlan.3. but if so, how can I use the vlan3 to access the layer3 address( EX4300's irb.3 address) in my EX3300?

3

Check your Ethernet switching configuration setup by irb instead of vlan
You may get a better answer by pasting your EX3300 configurations.

In my guess, the following configurations are on your EX3300 switch.

set interfaces vlan unit 0 family inet address xx.xx.xx.xx/xx
set vlans default l3-interface vlan.3

These VLAN settings should be the following IRB settings:

set interfaces irb unit 0 family inet address xx.xx.xx.xx/xx
set vlans default l3-interface irb.3

Juniper IRB Settings

  • I confused EX2300 and EX3300. EX3300 is an old switch and it does not support IRB CLI syntax. – Roger Sanghee Gold Apr 19 at 4:28
  • Newer switches comes with so-called ELS (Enhanced Layer-2 Software). In software with ELS support you use irb interfaces instead of vlan. – Andrey Prokhorov Apr 19 at 6:10

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