Transition Networks, Inc.
S4224 Web User Guide
33595 Rev. C
Page 667 of 669
In Cases E and F above, the SOAM PDUs that were inserted in the un-tagged or single-tagged portions of the
path are invisible to all points that are double tagged (since the double-tagged part of the path (the ‘tunnel’) has
hidden the fact that a frame is a SOAM PDU with the addition of a second (outer) tag). These frames do not
exist in the OAM Flow Space seen by the Service Provider and the Operator. Within the double-tagging, SOAM
PDUs can be inserted and they can use any MEG Level without consideration for the MEG levels used by
SOAM PDUs that use single tags.
Voice VLAN
Voice VLAN is VLAN configured specially for voice traffic. By adding the ports with voice devices attached to
voice VLAN, we can perform QoS-related configuration for voice data, ensuring the transmission priority of voice
traffic and voice quality.
VoIP
Voice over Internet Protocol.
VTY
(Virtual Type Terminal) - A
vty
interface and password must be created in order to enable Telnet access to an
IPv6 router. Also Virtual TTY (VTY).
W
WTB
The Wait To Block (WTB) timer is employed by the RPL owner to delay reversion after a forced switch or
manual switch has been cleared. From ITU-T Rec.G.8032/Y.1344 (03/2010).
WTR
WTR (
W
ait
T
o
R
estore) is the time a fail on a resource has to be 'not active' before restoration back to this
(previously failing) resource is done.
