DHCP Relay on EX9200

In this post we will see how DHCP Relay is configured on EX9200. Actually, the same type of configuration can be applied on any Juniper platform that supports ELS. DHCP Relay allows clients to get an IP address even when they are not in the same broadcast domain with the DHCP server. The DHCP Relay… Keep reading »

Workaround to enable DHCP Snooping in Juniper ELS CLI

DHCP Snooping allows a network device to monitor the DHCP messages received from untrusted devices connected to the network device. The DHCP Snooping is enabled per VLAN and the router or the switch where DHCP snooping is enabled checks the DHCP messages received from untrusted devices from that VLAN and builds the DHCP snooping database… Keep reading »

QinQ and L2PT on Junos ELS

I recently had to test QinQ on EX4600 along with Layer 2 Protocol Tunneling for Spanning Tree Protocol. Q-in-Q tunneling and VLAN translation allow service providers to create a Layer 2 Ethernet connection between two customer sites. Q-in-Q tunneling is useful when customers have overlapping VLAN IDs because customers’ VLAN (C-VLAN) tags are prepended by… Keep reading »