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This section is used to modify parameters that affect how bridging and the IEEE Spanning Tree algorithm operate on each bridge interface. Bridging of specific protocols on an interface is set in that protocol's configuration section.
configure Bridging {{Ethernet | WAN} slot:port | VPN number}
Ethernet | WAN | Identifies the type of port for which you want to configure this section. |
slot:port | For a modular platform, identify the slot:
For the VPN 5001 concentrator, enter only the port number. For a module with one port, the port is 0. |
VPN number | Identifies the VPN port you configured in the Tunnel Partners section for a LAN-to-LAN tunnel. |
After entering the configure command for the section, enter one or more of the following keywords.
mode = {on | off} | The mode keyword turns bridging on or off for this interface. To enable bridging on an interface, the mode keyword in the Bridging Global section must also be set to either Learning or IEEE. See the examples below for more details. |
unknownprotocolsbridged = {on | off} | The unknownprotocolsbridged keyword indicates whether unknown protocols which the device does not route (such as NetBEUI and DEC LAT) will be bridged on this interface. The default is on. |
portpriority = number | The portpriority keyword sets the IEEE 802.1D Spanning Tree protocol port priority parameter. This parameter is used to give precedence to an interface within the bridge. The port priority is combined with the interface number to create a Port ID. The interface with the lowest Port ID (numerically) will have precedence over interfaces with higher Port IDs. Values range from 0 to 255. |
pathcost = number | The pathcost keyword sets the IEEE 802.1 Spanning Tree protocol path cost parameter. This parameter sets the cost of using an interface and is used by the bridge to compute the distance from the root bridge. It may be used to artificially change the topology of a Spanning Tree network. The default value of 100 is recommended by the IEEE specification for 10 Mbit Ethernet interfaces. Values range from 1 to 65535. |
The following example shows a sample bridging configuration, and some interaction between this section and other configuration sections.
# # Bridging Configuration # [ Bridging Global ] Mode = IEEE # Make sure that Bridging is on [ Bridging Ethernet 0 ] Mode = On PathCost = 100 [ Bridging Ethernet 1 ] Mode = On PortPriority = 1 # # Bridge IP and Appletalk # [ IP Default ] Mode = Bridged [ Appletalk Default ] Mode = Bridged
It is important to remember that bridging must be turned on for the whole device in addition to turning it on in the individual interface sections. For example, to bridge IP traffic on Ethernet 0, the following parameters must be set.
[ Bridging Global ] Mode = IEEE [ Bridging Ethernet 0 ] Mode = On [ IP Ethernet 0 ] Mode = Bridged
If all interfaces for a particular protocol are being bridged and you would like to manage the system using that protocol family, then that protocol must be Routed on the bridge port.
For example, if AppleTalk is bridged on all interfaces and you want to use VPN 5000 Manager on a Macintosh to configure the device, configure the AppleTalk bridge port this way:
[ AppleTalk Phase 2 Bridge ] Mode = Routed
If IP is bridged on all interfaces and you want to use VPN 5000 Manager or telnet to the device, configure the IP bridge port as follows. When configured this way, you can telnet to the IP address noted.
[ IP Bridge ] Mode = Routed IPAddress = 192.15.1.1 SubnetMask = 255.255.255.0
| Command | Description |
|---|---|
configure AppleTalk | Configures AppleTalk parameters for an interface |
configure Bridging Global | Enables bridging for the device |
configure IP | Configures IP parameters for an interface |
configure IPX | Configures IPX parameters for an interface |
set bridge | Sets bridge configuration parameters |
show bridge | Shows bridge configuration, status and statistics |
Posted: Wed Sep 27 10:35:24 PDT 2000
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