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HP Netelligent 2008 User Manual: Backup Port

Hp netelligent 2008: user guide.
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Backup Port

Any port on the repeater can function as a backup port for another port on the
same repeater. This feature is useful for mission-critical applications (for
example, order-entry workstations connected to a file server). About every 5
seconds, the repeater monitors the status of the primary port. If the port has lost
its link test or has been autopartitioned by the hardware, the repeater enables the
backup port and sends a health state trap to each management station contained
in its IP and IPX trap tables.
Figure 3-11 shows a file server with two network interface cards (NICs)
connected to two ports on a repeater. In this example, Port 1 is the primary port
and Port 2 is the backup port.
NIC 1
NIC 2
File Server
Figure 3-11. Backup Port Example
NOTES:
Series 2000 Snappable
Hub
PWR
SEG
Media Expansion
COL
Port
MEP
Series 2000 Snappable
Hub
PWR
SEG
Media Expansion
COL
Port
MEP
Series 2000 Snappable
Hub
PWR
SEG
Media Expansion
COL
Port
MEP
Primary Port
Backup Port
If the backup port fails, the repeater does not re-enable the primary port.
When the backup port is enabled, the repeater prevents the primary port from
automatically being re-enabled. To re-enable the primary port, you must use an
SNMP network manager to change the backup port status.
1
2
3
4
5
6
7
8
9
10
X
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
9
10
X
X
X
X
X
X
X
X
X
1
2
3
4
5
6
7
8
9
10
X
X
X
X
X
X
X
X
X
Netelligent 2008/2016 10Base-T Repeater User Guide
11
12
13
14
15
16
UP LINK
COM PORT
MDI MDI-X
X
X
X
X
X
X
11
12
13
14
15
16
UP LINK
COM PORT
MDI MDI-X
X
X
X
X
X
X
11
12
13
14
15
16
UP LINK
COM PORT
MDI MDI-X
X
X
X
X
X
X
3-13
TM
EXPANSION
Repeater 1
IN
OUT
TM
EXPANSION
Repeater 2
IN
OUT
TM
Repeater 3
EXPANSION
IN
OUT

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