Datasheet

All contents are Copyright © 1992--2002 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.
Page 6 of 10
Figure 1-1
In Figure 1-2, Switch B successfully receives traffic from Switch A on the fiber-optic port. However, due to faulty wiring, Switch A
receives traffic from Switch C on this port. The UDLD protocol running on Switch A will signal an error condition and disable
the port.
Figure 1-2
In Figure 1-3, Switch A is incorrectly wired for a self loop back to its own port. The UDLD protocol will signal an error condition
and disable the port.
Figure 1-3
SPAN Enhancements
The SPAN feature allows the mirroring of network traffic for analysis by a SwitchProbe device or other RMON probe. SPAN
mirrors traffic from one or more source ports on the same VLAN to a destination port for analysis.
The Catalyst 6000 Family supports several enhancements to the SPAN capability found in the Cisco Catalyst switches. The
first is the ability to support multiple concurrent SPAN sessions, each to a different destination port. The Catalyst 6000 family
supportstwo ingress(RX) or Both(RX andTX) SPANsessions and upto fouregress (TX)-onlySPAN sessions. Thefollowing SPAN
sessions in Table 3 can all be active at the same time.
There can be overlap in the SPAN sources—notice that ports 3/1 and 3/2 are in both the second and third SPAN sessions above.
Table 3 Span Example
SPAN Source(s) SPAN Destination SPAN Direction Notes
SPAN Session 1: 2/10 6/1 Both HP probe on port 6/1
SPAN Session 2: 2/11 6/2 RX HP probe on port 6/2
SPAN Session 3: 3/1, 3/2 7/12 TX SwitchProbe on port 7/12
SPAN Session 4: 2/1-3/24 8/11 TX NetRanger on port 8/11
SPAN Session 5: VLAN_4, VLAN_7 8/12 TX Sniffer on port 8/12
SPAN Session 6: VLAN_9 8/10 TX W&G DA-30 on port 8/10
Si Si
tx
Switch A
rx
rx
tx
X
Switch B
Si Si
tx
rx
Switch A
Si
Switch C
rx
tx
tx
Switch B
Si
tx
Switch A
rx