Monitoring and Analyzing Switch Operation
Traffic Mirroring
Untagged Mirrored Packets
Although a VLAN tag is added (by default) to the mirrored copy of untagged
outbound packets to indicate the source VLAN of the packet, it is sometimes
desirable to have mirrored packets look exactly like the original packet. The
no-tag-added parameter gives you the option of not tagging mirrored copies of
outbound packets.
ProCurve(config)#interface 3 monitor all in mirror 1 no-tag-added
ProCurve(config)#interface mesh monitor all both mirror 1 no-tag-added
Figure B-28. Mirroring Commands with the no-tag-added Option
ProCurve# show monitor 1
Network Monitoring
Session: 1 Session Name:
ACL: no ACL relationship exists
Mirror Destination: 48
Untagged traffic : untagged
Monitoring Sources Direction
------------------ ---------
Port: 3 Both
Indicates the no-tag-added option is configured.
Figure B-29. Displaying a Mirror Session Configuration with the no-tag-added Option
Using SNMP to Configure No-Tag-Added. The MIB object hpicfBridge-
DontTagWithVlan 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
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