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JUNOSe 10.0.3 Release Notes
Dynamic Interfaces
18
Known Behavior
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.
The ip inactivity-timer command enables you to specify that dynamic
interfaces are deleted after a certain period of inactivity. IP polls the dynamic
interface at the configured interval to determine whether the interface was
active during the interval. Inactive interfaces are deleted only when the period
of inactivity is equal to or greater than the configured value.
For example, if you configure an inactivity timer of 15 minutes, IP polls the
interface every 15 minutes. If a poll determines that the interface was last
active 14 minutes earlier, the inactive time is less than the configured value so
nothing happens. IP polls again 15 minutes later. If the interface is still inactive
then the total period of inactivity is now 29 minutes. This is greater than the
configured value and the interface is deleted.
Dynamic IPv6 interfaces over static PPP interfaces are not supported.
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