Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual page 142

JunosE 11.3.x Service Availability Configuration Guide
120
Table 20: Application Support for Unified In-Service Software Upgrades
(continued)
Application Supported
DHCP Packet Capture
DHCP Proxy Client –
DHCP Relay Proxy
DHCP Relay Server
DHCPv4 Local Server
DHCPv6 Local Server –
Unsupported Notes
– Configuration of
DHCP packet capture
does not prevent
unified ISSU from
proceeding. However,
the capturing of
packets on the line
modules is halted
when the unified ISSU
upgrade phase
commences. Packet
capture resumes
automatically during
the unified ISSU
service restoration
phase.
–
– DHCP relay proxy
continues processing
of DHCP release
requests during the
unified ISSU to
maintain server-client
synchronization. State
is preserved across
the upgrade; statistics
are not preserved.
– –
– Forwarding outages
that take place during
a unified ISSU can
affect DHCP lease
renewal. Before you
begin unified ISSU, we
recommend that you
configure the DHCP
local server address
pools with a minimum
lease time of 120
minutes to ensure
that leases do not
expire during the
upgrade.
Unified ISSU does not
support IPv6.
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