Interfaces
Page 320 7750 SR Interface Configuration Guide
Description This command enables the fail-on-error feature. If an MDA is experiencing too many Egress XPL Errors,
this feature causes the MDA to fail. This can force an APS switchover or traffic re-route. The purpose of
this feature is to avoid situations where traffic is forced to use a physical link that suffers from errors but is
still technically operational.
The feature uses values configured in the config>card>mda>egress-xpl context. When this feature is
enabled on a MDA, if window consecutive minutes pass in which the MDA experiences more than threshold
Egress XPL Errors per minute, then the MDA will be put in the failed state.
The no form of this command disables the feature on the MDA.
clock-mode
Syntax clock-mode adaptive
clock-mode differential [timestamp-freq {19440 | 77760 | 103680}]
Context config>card>mda
Description This command defines the clocking mode on the specified CMA/MDA. This command is only supported on
CES CMAs and MDAs.
Default adaptive
Parameters adaptive — Specifies that MDA is in the adaptive clock mode. This CMA/MDA can use adaptive clock
recovery methods.
differential — Specifies that MDA is in the differential clock mode. This CMA/MDA can use differential
clock recovery methods.
timestamp-freq — This sets the differential timestamp frequency to be 103.68 MHz (default), 77,76 MhZ or
19.44 MHz. The frequency value is entered in kHz, thus valid values are 103680, 77760 and 19440. If
this parameter is omitted, the default timestamp frequency of 103.68 MHz is used.
Values 19440, 77760, 103680
hi-bw-mcast-src
Syntax hi-bw-mcast-src [alarm] [group group-id]
no hi-bw-mcast-src
Context config>card>mda
Description This command designates the MDA as a high-bandwidth IP multicast source, expecting the ingress traffic to
include high-bandwidth IP multicast traffic. When configured, the system attempts to allocate a dedicated
multicast switch fabric plane (MSFP) to the MDA. If a group is specified, all MDAs in the group will share
the same MSFP. If the alarm parameter is specified and the system cannot allocate a dedicated MSFP to the
new group or MDA, the MDAs will be brought online and generate an event (SYSTEM: 2052 - mdaHiBw-
MulticastAlarm). Similarly, if during normal operation there is a failure or removal of resources, an event
will be generated if the system cannot maintain separation of MSFPs for the MDAs.
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