Configuration Notes; General - Alcatel-Lucent 7750 SR OS Service Manual

Configuration Notes

This section describes mirroring configuration caveats.
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General

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7750 SR OS Services Guide
Up to 255 mirroring service IDs may be created within a single system.
A mirrored source can only have one destination.
The destination mirroring service IDs and service parameters are persistent between
router (re)boots and are included in the configuration saves.
The source packet mirroring enabling criteria defined in debug mirror mirror-source
commands are not preserved in configuration saves.
Physical layer problems such as collisions, jabbers, etc., are not mirrored. Typically, only
complete packets are mirrored. Complete stats are available on the interface for these
physical layer problems.
Starting and shutting down mirroring:
Mirror destinations:
→ The default state for a mirror destination service ID is
command to enable the feature.
no shutdown
→ When a mirror destination service ID is shutdown, mirrored packets associated with
the service ID are not accepted from its mirror source or remote source 7750 SR
router. The associated mirror source is put into an operationally down mode. Mirrored
packets are not transmitted out the SAP or SDP. Each mirrored packet is silently
discarded. If the mirror destination is a SAP, the SAP's discard counters are
incremented.
→ Issuing the
shutdown
source to be put into an administratively down state. Mirror destination service IDs
must be shut down first in order to delete a service ID, SAP, or SDP association from
the system.
Mirror sources:
→ The default state for a mirror source for a given mirror-dest service ID is
. You must enter a
shutdown
from that mirror-source.
→ Mirror sources do not need to be shutdown to remove them from the system. When a
mirror source is shutdown, mirroring is terminated for all sources defined locally for
the mirror destination service ID.
command causes the mirror destination service or its mirror
command to deactivate (disable) mirroring
shutdown
Mirror Services
. You must issue a
shutdown
no
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