Filter
Top Products
Configuring LAN Interfaces
Configuring a Hub Interface
IC-44
Cisco IOS Interface Configuration Guide
Controlling the FDDI SMT Message Queue Size
You can set the maximum number of unprocessed FDDI Station Management (SMT) frames that will be
held for processing. Setting this number is useful if the router you are configuring gets bursts of
messages arriving faster than the router can process them. To set the number of frames, use the following
command in global configuration mode:
Preallocating Buffers for Bursty FDDI Traffic
The FCI card preallocates three buffers to handle bursty FDDI traffic (for example, NFS bursty traffic).
You can change the number of preallocated buffers by using the following command in interface
configuration mode:
Configuring a Hub Interface
The Cisco 2500 series routers includes routers that have hub functionality for an Ethernet interface. The
hub is a multiport repeater. The advantage of an Ethernet interface over a hub is that the hub provides a
star-wiring physical network configuration while the Ethernet interface provides 10BASE-T physical
network configuration. The router models with hub ports and their configurations are as follows:
• Cisco 2505—1 Ethernet (8 ports) and 2 serial
• Cisco 2507—1 Ethernet (16 ports) and 2 serial
• Cisco 2516—1 Ethernet (14 ports), 2 serial, and 1 ISDN BRI
We provide SNMP management of the Ethernet hub as specified in RFC 1516, “Definitions of Managed
Objects for IEEE 802.3 Repeater Devices.”
To configure hub functionality on an Ethernet interface, perform the tasks in the following sections:
• Enabling a Hub Port (Required)
• Disabling or Enabling Automatic Receiver Polarity Reversal (Optional)
• Disabling or Enabling the Link Test Function (Optional)
• Enabling Source Address Control (Optional)
• Enabling SNMP Illegal Address Trap (Optional)
For configuration examples, see the “Hub Configuration Examples” section.
Command Purpose
smt-queue-threshold number
Sets SMT message queue size.
Command Purpose
fddi burst-count
Preallocates buffers to handle bursty FDDI traffic.