Cisco Catalyst 3750-E Software Configuration Manual page 389

Chapter 12 Configuring Interface Characteristics
Figure 12-3
Stack member 1
Stack member 2
Stack member 3
Stack member 4
Stack member 5
Stack member 6
Stack member 7
By default, the Ethernet management port is enabled. The switch cannot route packets from the Ethernet
management port to a network port, and the reverse.
Even though the Ethernet management port does not support routing, you might need to enable routing
protocols on the port (see
on the Ethernet management port when the PC is multiple hops away from the switch and the packets
must pass through multiple Layer 3 devices to reach the PC.
Figure 12-4
In Figure
routing process, the routes are propagated as follows:
The routes from the Ethernet management port are propagated through the network ports to the
•
network.
The routes from the network ports are propagated through the Ethernet management port to the
•
network.
Because routing is not supported between the Ethernet management port and the network ports, traffic
between these ports cannot be sent or received. If this happens, data packet loops occur between the
ports, which disrupt the switch and network operation. To prevent the loops, configure route filters to
avoid routes between the Ethernet management port and the network ports.
OL-9775-08
Connecting a Switch Stack to a PC
Switch stack
Ethernet management ports
Catalyst 3750 switches do not have Ethernet management ports.
Catalyst 3750 switches in a mixed stack are not connected to the hub.
Figure
Network Example with Routing Protocols Enabled
Ethernet
management
Switch
port
Network
ports
Network
cloud
12-4, if the Ethernet management port and the network ports are associated with the same
12-4). For example, in Figure
Network
cloud
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
Using the Ethernet Management Port
PC
Hub
12-4, you must enable routing protocols
PC
12-19