Table of Contents
Advertisement
JUNOSe 11.1.x Service Availability Configuration Guide
Table 14: Application Support for Unified In-Service Software Upgrades (continued)
76
Application Support for Unified ISSU
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.
Advertisement
Table of Contents
