Cisco Cisco Gigabit Ethernet GBIC SFP Modules 發佈版本通知
Release Notes for Catalyst GigaStack Gigabit Interface Converter 3
Important Notes
Important Notes
Types of Loops Not Permitted
Do not create a loop in a stack configuration within a single GBIC. A loop occurs when one of the following
conditions occurs:
conditions occurs:
•
A GigaStack GBIC port within a daisy-chain stack connection is connected to a GigaStack GBIC
port of another device in the stack that already has a GigaStack GBIC port connected to a device
in that stack; both ports are in the same stack. See Figure 1.
port of another device in the stack that already has a GigaStack GBIC port connected to a device
in that stack; both ports are in the same stack. See Figure 1.
Figure 1
Incorrect Cabling of Switches in a Stack
•
A single GigaStack cable is inserted in port 1 and port 2 of the same GigaStack GBIC. See
Figure 2.
Figure 2.
Figure 2
Incorrect Cabling in a Single Switch
A loop causes excessive collision errors on the port and might cause the link to become unstable.
This instability decreases performance on the links, and communication between the switches in the
stack is adversely affected. For proper configuration scenarios, see the Catalyst GigaStack Gigabit
Interface Converter Installation Guide.
This instability decreases performance on the links, and communication between the switches in the
stack is adversely affected. For proper configuration scenarios, see the Catalyst GigaStack Gigabit
Interface Converter Installation Guide.
Note
You can form a redundant link by connecting two different GigaStack GBICs within the same
switch. See the Catalyst GigaStack Gigabit Interface Converter Installation Guide.
24066
SPEED
SYSTEM
RPS
STATUS
MODE
UTIL
DUPLX
2
Catalyst 3500
XL
1
Port 1
Port 2
SPEED
SYSTEM
RPS
STATUS
MODE
UTIL
DUPLX
Catalyst 3500
XL
7
8
3
5
6
4
2
1
SPEED
SYSTEM
RPS
STATUS
MODE
UTIL
DUPLX
9
10
11
12
2
Catalyst 3500
XL
1
2
3
4
5
6
7
8
1
1
2
1
2
1
2
9
10
11
12
1
2
3
4
5
6
7
8
13
14
15
16
17
18
19
20
21
22
23
24
Catalyst 3508G XL
Catalyst 3512 XL
Catalyst 3524 XL
1X
2X
11X
12X
1X
2X
11X
12X
13X
14X
15X
16X
SPEED
SYSTEM
RPS
STATUS
MODE
UTIL
DUPLX
Catalyst 3500
XL
7
8
3
5
6
4
2
1
1
2
23833
Catalyst 3508G XL