Srp Ioa; Module Details - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - E120 AND E320 HARDWARE GUIDE REV 9-29-2010 Hardware Manual

E120 and E320 11.3.x Hardware Guide

SRP IOA

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The SRP I/O adapter (IOA) is a single input/output adapter that interfaces with the SRP
modules through the system's midplane. See Figure 2 on page 5 and Figure 4 on page 6
for its location.

Module Details

The SRP IOA provides standard management interfaces, including:
10/100Base-T—The port enables access to the router for Ethernet management
functions through Telnet, Secure Shell Server (SSH), command-line interface (CLI),
or Simple Network Management Protocol (SNMP), for example.
RS-232—One port (console) provides a serial connection for monitoring the system's
hardware configuration through a PC (running terminal emulation software) or ASCII
terminal and enables direct CLI access. The second port (auxiliary) provides access
to debug ports on specific processors (SRP module, line module). Juniper Networks
customer support engineers use the auxiliary port. We recommend that users do not
use the auxiliary port.
External timing inputs—The BNC connectors provide a method of ensuring that the
clock timing used by the router remains synchronized with the network's system clock.
You can hot-swap SRP IOAs. Hot-swapping enables you to add or remove SRP IOAs
without powering down the system. When you complete hot-swapping an SRP IOA, its
MAC address in the subnet is automatically refreshed without rebooting the SRP or the
chassis. Also, you can re-insert an SRP IOA that you had taken out previously to the same
network without refreshing the MAC address of the SRP IOA.
NOTE: Hot-swapping an SRP IOA is unsupported during a unified in-service
software upgrade (ISSU).
If you have configured RADIUS server on an SRP IOA that you want to replace, you can
perform either of the following actions to prevent loss of accounting or logout information:
Disable accounting and, when there is no subscriber login or logout activity, hot-swap
SRP IOA.
Increase the timeout value of the RADIUS server configured depending on the time
used for IOA replacement. The maximum timeout value is 1000 seconds.
After you complete hot-swapping the SRP IOA, you can use the
to display the state of the SRP IOA.
The SRP IOA hot-swapping is supported on the following routers:
E320 router with SRP-100 or SRP-320
E120 router
show version all command
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