Network Instruments GigaStor 114ff - Manual (Page 84)

WAN Load by DLCI
Chapter 5 Using Observer with a WAN Probe 84
rev. 1
WAN Load by DLCI
In a WAN installation, Observer’s Network Activity Display is called
WAN Load by DLCI. This mode shows critical WAN transfer rate and
congestion statistics in a number of formats. This display can show
you the health of a WAN link at a glance and can warn of impending
slowdowns due to congestion or other error conditions.
1 Choose Statistics → WAN Load by DLCI.
2 Press Start to begin capturing load data.
Table 7 WAN statistics
Column Description
DLCI Data Link Connection Identifier of the statistics that follow. For encapsulations
that do not use DLCI (such as X.25), the correct address value is shown even
though it is still labeled DLCI.
DCE KBits/s Max The maximum bit rate sensed so far from the DCE side of this DLCI, in Kbits per
second.
DTE KBits/s Max The maximum bit rate sensed so far from the DTE side of this DLCI, in Kbits per
second.
DCE Kbits/s Avg The average bit rate sensed on the DCE side of this DLCI, in Kbits per second.
DTE Kbits/s Avg The average bit rate sensed on the DTE side of this DLCI, in Kbits per second.
DCE FECN under CIR The number of packets seen on the DCE side of the link that had the Forward
Explicit Congestion Notification bit set, even though the bandwidth usage was
within the Committed Information Rate (CIR). Normally this number should be
zero. If bandwidth usage exceeds CIR, congestion is expected.
DTE FECN under CIR The number of packets seen on the DTE side of the link that had the Forward
Explicit Congestion Notification bit set, even though the bandwidth usage was
within the Committed Information Rate (CIR). Normally this number should be
zero. If bandwidth usage exceeds CIR, congestion is expected.
DCE BECN under CIR The number of packets seen on the DCE side of the link that had the Backward
Explicit Congestion Notification bit set, even though the bandwidth usage was
within the Committed Information Rate (CIR). Normally this number should be
zero. If bandwidth usage exceeds CIR, congestion is expected.
DTE BECN under CIR The number of packets seen on the DTE side of the link that had the Backward
Explicit Congestion Notification bit set, even though the bandwidth usage was
within the Committed Information Rate (CIR). Normally this number should be
zero. If bandwidth usage exceeds CIR, congestion is expected.