Management and Configuration Guide K/KA/KB.15.15

Figure 180 Displaying a mirror session configuration with the no-tag-added option
About using SNMP to configure no-tag-added
The MIB object hpicfBridgeDontTagWithVlan is used to implement the no-tag-added option, as
shown below:
hpicfBridgeDontTagWithVlan OBJECT-TYPE
SYNTAX INTEGER
{
enabled(1),
disabled(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This oid mentions whether VLAN tag is part of the
mirror'ed copy of the packet. The value ‘enabled'
denotes that the VLAN tag shouldn't be part
of the mirror'ed copy; ‘disabled' does put
the VLAN tag in the mirror'ed copy. Only one
logical port is allowed.
This object is persistent and when written
the entity
SHOULD save the change to non-volatile storage."
DEFVAL { 2 }
::= { hpicfBridgeMirrorSessionEntry 2 }
Operating notes
The following conditions apply for the no-tag-added option:
• The specified port can be a physical port, trunk port, or mesh port.
• Only a single logical port (physical port or trunk) can be associated with a mirror session
when the no-tag-added option is specified. No other combination of ACL mirroring, VLAN
mirroring, or port mirroring can be associated with the mirror session. If more than one logical
port is specified, the following error message is displayed:
Cannot monitor more than one logical port with no-tag-added option
• If a port changes its VLAN membership and/or untagged status within the VLAN, the "untagged
port mirroring" associated with that port is updated when the configuration change is
processed.
• Only four ports or trunks can be monitored at one time when all four mirror sessions are in
use (one logical port per mirror session) without VLAN tags being added to a mirrored copy.
• The no-tag-added option can also be used when mirroring is configured with SNMP.
• A VLAN tag is still added to the copies of untagged packets obtained via VLAN-based
mirroring.
352 Monitoring and Analyzing Switch Operation