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This chapter describes how to configure the Catalyst 5000 series Layer 3 fabric integration module.
This chapter consists of these sections:
The Layer 3 fabric integration module seamlessly integrates the Catalyst 5500 switching fabric and the Catalyst 8510 Campus Switch Router (CSR) switching fabric in a Catalyst 5500 chassis.
The module consists of eight external 100BaseFX Fast Ethernet ports and four 100-Mbps internal interfaces that integrate the Catalyst 5500 switching backplane to the Catalyst 8510 CSR switching backplane. The module can be installed in slots 9 through 12 in the Catalyst 5500 switch to bridge the two backplanes.
The eight external Fast Ethernet ports function exactly as any other Catalyst 5000 series 100BaseFX Fast Ethernet MMF ports. When the fabric integration module is installed in slot 9 through 12 of the Catalyst 5500 chassis, these eight ports function normally regardless of whether there is a Catalyst 8510 CSR Switch Route Processor (SRP) installed in slot 13. For complete information on Fast Ethernet port configuration, see "Configuring Ethernet and Fast Ethernet Switching."
By default, the four internal interfaces are configured as a Fast EtherChannel InterSwitch Link (ISL) VLAN trunk that provides an 800-Mbps (400-Mbps full-duplex) link between the Catalyst 5500 switch and the Catalyst 8510 CSR switch.
To achieve connectivity between the two switches, you must configure a port-channel interface on the Catalyst 8510 CSR switch and group the four internal interfaces to that port-channel interface. You must then configure subinterfaces on the port-channel interface. Configure a subinterface for each VLAN configured on the Catalyst 5500 switch. For each subinterface, you must specify ISL encapsulation and assign an IP address and subnet mask.
Frames originating on the Catalyst 5000 switch backplane are forwarded across the trunk link to the subinterfaces that you configure. Traffic is routed between VLANs (subinterfaces) as appropriate. Frames originating on the Catalyst 8510 CSR are forwarded across the trunk link to the Catalyst 5500 switch where they are switched as appropriate.
The eight external 100BaseFX Fast Ethernet ports of the fabric-integration module (ports 1-8) have the same default configuration as all Catalyst 5000 series Fast Ethernet ports. For information on the Fast Ethernet port default configuration, refer to the "Default Ethernet and Fast Ethernet Configuration" section.
Table 41-1 shows the Catalyst 5500 default configuration for the Layer 3 fabric integration module internal interfaces.
| Feature | Default Value |
|---|---|
Port enable state | All ports enabled |
Port name | None |
Port priority | Normal |
Duplex mode | Full-duplex |
Native VLAN | VLAN 1 |
Port VLAN cost | 19 |
Fast EtherChannel | Enabled (four-port bundle) |
Trunking | isl encapsulation, nonegotiate mode |
Allowed VLAN range | 1-1000 |
Table 41-2 shows the Catalyst 8510 CSR default configuration for the fabric integration module internal interfaces.
| Feature | Default Value |
|---|---|
Fast EtherChannel |
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These hardware and software restrictions apply when using the Layer-3 fabric integration module:
These sections describe how to configure the Layer 3 fabric integration module:
You can configure the eight external 100BaseFX Fast Ethernet ports on the Layer 3 fabric integration module exactly as you configure any Fast Ethernet port on the Catalyst 5000 series switches.
For information on configuring Fast Ethernet ports, refer to "Configuring Ethernet and Fast Ethernet Switching."
 | Caution Changing the default configuration of the internal interfaces from the Catalyst 5500 CLI without making the appropriate adjustments from the Catalyst 8510 CSR CLI can cause problems. Make sure that when you make configuration changes to the internal interfaces that you make the proper changes on both the Catalyst 5000 and the Catalyst 8510 CSR. |
The default Catalyst 5000 configuration for the four internal interfaces should be adequate for most situations. The interfaces form a full-duplex Fast EtherChannel ISL trunk link between the Catalyst 5500 and the Catalyst 8510 CSR switches.
To change the default configuration for the internal interfaces, see the following sections:
To configure interVLAN routing on the internal interfaces of the Layer 3 fabric integration module, you must perform these tasks in the order given:
1. Connect to the Catalyst 8510 CSR CLI through the console port or a Telnet connection.
2. Create a four-port port-channel interface and group the Layer 3 Fabric Integration Module internal interfaces to the port-channel interface. For infomation on creating and grouping interfaces to a port-channel interface, see "Creating and Grouping Ports to a Port-Channel Interface" section.
3. Configure subinterfaces on the port-channel interface, one for each VLAN for which you want to route traffic. The Layer 3 Fabric Integration Module supports only ISL encapsulation. For infomation on configuring subinterfaces on the port-channel interface, see "Configuring Subinterfaces for IP InterVLAN Routing" section.
Posted: Tue Mar 30 16:14:09 PST 1999
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