7210 SAS-MXP, R6, R12, S, SX, T BASIC SYSTEM
CONFIGURATION GUIDE RELEASE 22.9.R1
System management
• OSPF default session timeout is approximately 40 seconds. The timeout intervals are configurable.
• BGP default session timeout is approximately 120 seconds. The timeout intervals are configurable.
Therefore, router software must recover faster than the specified time interval to maintain up time.
6.2.1.1.2 Configuration redundancy on 7210 SAS-R6 and 7210 SAS-R12
Features configured on the active device CFM or CPM are also saved on the standby CFM or CPM. If the
active device CFM or CPM fails, these features are brought up on the standby device that takes over the
mastership and becomes the active CFM or CPM.
Even with modern modular and stable software, the failure of route processor hardware or software can
cause the router to reboot or cause other service impacting events. In the best circumstances, failure leads
to the initialization of a redundant route processor, which hosts the standby software configuration, to
become the active processor. The following options are available:
• warm standby
The router image and configuration is already loaded on the standby route processor. However, the
standby could still take a few minutes to become effective because it must first reinitialize connections
by bringing up Layer 2 connections and Layer 3 routing protocols, and then rebuild the routing tables.
• hot standby
The router image, configuration, and network state are already loaded on the standby; it receives
continual updates from the active route processor and the swap-over is immediate. Newer generation
routers, like the 7210 SAS routers have extra processing built into the system so that router
performance is not affected by frequent synchronization, which consumes increased system resources.
6.2.1.1.3 Component redundancy
7210 SAS component redundancy is critical to reducing MTTR for the routing system.
Note:
This feature is supported on all 7210 SAS platforms as described in this document, including
those operating in access-uplink mode.
Component redundancy consists of the following:
• redundant power supply
The use of 2 power supplies is supported for redundant power supplies. A power module can be
removed without impact on traffic when redundant power supplies are in use. The power supply is hot
swappable. The 7210 SAS-S 1/10GE platform supports a single fixed non-removable integrated power
supply and a hot-swappable power supply.
Note:
– On the 7210 SAS-S 1/10GE platform, if the device is booted with a power entry module
and there is a power supply, the system detects the power supply. If the device is booted
with a power entry module but there is no power supply, the system does not detect the
‟power-supply type”. This occurrence is reported as none and the PS LED is OFF.
3HE 18197 AAAB TQZZA
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