Known Behavior
27
Release 11.1.0
Release 8.1.2 and all higher-numbered 8.1.x releases and patch releases
Release 8.2.3 and all 8.2.3 patch releases
Release 9.0.0 and all 9.0.0 patch releases
Release 9.0.1 and all 9.0.1 patch releases
Release 9.1.0 and all 9.1.0 patch releases
If you are upgrading the JUNOSe Software on the router from any of these
releases, you must explicitly issue the
ip dhcp-external
recreate-subscriber-interface
command to configure the router to continue to
delete and re-create the DHCP client’s dynamic subscriber interface.
DHCP external server may not be able to bind all DHCP clients when all of the
following conditions exist:
DHCP external server and either DHCP relay or relay proxy are configured
in separate virtual routers on an E320 router.
The client-facing and server-facing interfaces for DHCP external server and
either DHCP relay or relay proxy are configured on the same ES2 4G LM.
DHCP external server is configured to create dynamic subscriber
interfaces.
When these three conditions exist simultaneously, the ES2 4G LM may not be
able to successfully process all DHCP packets. Although all clients may get
bounded in DHCP relay or relay proxy, some clients may not get bounded in
DHCP external server. (In a production environment it is highly unlikely for
conditions 1 and 2 to exist because stand-alone DHCP external server is
normally configured for a DHCP relay in a different chassis.)
Work-around:
You can eliminate this issue by modifying any one of these
conditions. For example, this issue does not exist with any of the following
configuration modifications:
Configure DHCP external server and either DHCP relay or relay proxy in
the same virtual router.
Configure the client-facing and server-facing interfaces for DHCP external
server and either DHCP relay or relay proxy on the same ES2 10G LM
instead of the same ES2 4G LM.
Configure the client-facing and server-facing interfaces for DHCP external
server and either DHCP relay or relay proxy on separate ES2 4G LMs.
Dynamic Interfaces
Dynamic IPv6 interfaces over static PPP interfaces are not supported.
NOTE:
The DHCP external server application is unsupported in JUNOSe Release
8.2.1 and JUNOSe Release 8.2.2.