Managing The System; Configuring The Switch Fabric Bandwidth; Configuring Timing - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SYSTEM BASICS CONFIGURATION GUIDE 2010-10-04 Configuration Manual

Configuring the Switch Fabric Bandwidth

fabric weights

Configuring Timing

timing disable-auto-upgrade
Copyright © 2010, Juniper Networks, Inc.
router1(config)#hostname host1
host1(config)#
There is no no version.
See hostname.
By default, the switch fabric for the Juniper Networks ERX1440, ERX310, E120, and E320
routers uses a bandwidth weighting ratio of 15:2 for multicast-to-unicast weighted round
robin (WRR). In the absence of strict-priority traffic, and when both unicast and multicast
traffic compete for switch fabric bandwidth, the switch fabric allocates 15/17ths of the
available bandwidth to multicast traffic and 2/17ths of the available bandwidth to unicast
traffic.
The fabric weights command enables you to specify a ratio for multicast-to-unicast
traffic on the router switch fabric. The no version of the command reverts the weighting
ratio back to its default.
Use to define the multicast-to-unicast traffic ratio for the switch fabric for the ERX1440,
ERX310, E120, and E320 routers
Example
host1(config-traffic-class)# fabric weights multicast 2 unicast 1
Use the no version to return the switch fabric to its default multicast-to-unicast ratio
(15:2).
See fabric weights.
You can use the timing source command to configure three timing sources for the system.
These sources are known as the primary, secondary, and tertiary sources. The system
periodically polls the status of the current timing source. If the system discovers that the
current source has become unavailable, it polls the timing source you specified as next
in line. If this source is available, it switches to this source; if not, it then polls the next
source in line. If the lowest source is unavailable, the system maintains the SRP clock as
the source.
If you enable auto-upgrade, in the event of a source failure, the system—after switching
to a lower source—polls all higher configured sources and automatically switches back
to the highest timing source when that source becomes available.
The timing select command enables you to specify which source (primary, secondary,
or tertiary) the system is to use by default. The system will never attempt to upgrade to
a source higher than the selected source.
Chapter 5: Managing the System
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