Architecture Overview
The Quick Configuration Guide window shows the VLAN architecture and the relationship
between the protocols, interfaces, ports, and VLAN Secure
Domains (VSDs):
With the exception of the ATM physical interface, there is a one-to-one
relationship between physical interfaces and bridge ports.
The ATM physical interface has as many as 16 logical interfaces. These
interfaces can be any combination of LAN Emulation Clients (ATM LECs) and ATM bridge
tunnels, each of which has a one-to-one relationship with a bridge port.
The bridge ports in turn have a many-to-one relationship with the VSDs.
That is, one or more bridge ports may be associated with a single VSD. The same bridge
port cannot exist in more than one VSD.
Each VSD interacts with the network protocols through its own VLAN
interface (VI).
Managing Physical Interfaces
You can use the Quick Configuration Guide window to access status and
configuration information for a physical interface. You can also
access procedures to enable or disable an interface or modify interface characteristics.
Procedure:
Step |
Action |
1 |
Select the physical interface: FDDI or ATM. Note: If you select an ATM interface, you can access ATM
information from either the ATM physical interface or the ATM
logical interfaces. |
2 |
In the Interface Configuration window,
click the Details button associated with your physical interface: |
3 |
From the Status and Configuration window,
you can:
- View the status and configuration of specific interfaces
- Enable or disable an interface
- Set interface configuration parameters (parameters you can set differ depending on the
interface)
For instructions on how to perform these tasks, click the Help button at the bottom of
the Status and Configuration window. |
Managing Logical Interfaces
You can use the Quick Configuration Guide window to access status and
configuration information for the ATM logical interfaces of a
GS2000 line card. You can also access procedures to enable or disable the
interfaces or modify interface characteristics.
Procedure:
Step |
Action |
1 |
Select the logical interface associated
with your ATM physical interface: ATM LEC or ATM Bridge Tunnel. |
2 |
In the Interface Configuration window,
click the Details button associated with your logical interface:
- ALEC/n, for an ATM LAN Emulation (LANE) client
- AFBT/n, for an ATM FDDI bridge tunnel
- AEBT/n, for an ATM Ethernet bridge tunnel
(n represents the interface number)
|
3 |
From the ATM (LEC or Bridge) Status and
Configuration window, you can:
- View the interface status and configuration information
- Select the interface type
- Enable or disable the interface
- Set MAC type (if the interface is a bridge tunnel)
- Configure other interface parameters
For instructions on how to perform these tasks, click the Help button at the bottom of
the Status and Configuration window. |
Managing Bridge Ports
You can use the Quick Configuration Guide window to access the status and
configuration information for bridge ports. You can also access
procedures to enable or disable a bridge port interface or modify interface
characteristics.
Procedure:
Step |
Action |
1 |
Select the circle that represents the
bridge port associated with the physical or logical interface. |
2 |
From the Bridge Interface Configuration
window, you can:
- View the status and configuration of the bridge ports on your line card
- Modify bridge port characteristics for the following interfaces:
FDDI\n for FDDI
ALEC\n for ATM LAN Emulation clients
AFBT\n for ATM FDDI bridge tunnels
AEBT\n for ATM Ethernet bridge tunnels
For instructions on how to perform these tasks, click the Help button on the bottom of
the Bridge Interface Configuration window. |
3 |
From the Bridge Interface - Add/Modify
window, you can:
- Enable or disable the bridge port interface
- Enable or disable the Spanning Tree protocol
- Enable or disable manual mode (non-listening)
- Set bridge port priority
For instructions on how to perform these tasks, click the Help button at the bottom of
the Bridge Interface - Add/Modify window. |
Managing VLAN Secure Domains (VSDs)
You can use the Quick Configuration Guide window to access the status and
configuration information for VLAN Secure Domains (VSDs). You can also
access procedures to add new VSDs and delete or modify existing VSDs.
Procedure:
Step |
Action |
1 |
Select the VSD associated with your
interface: FDDI or ATM. |
2 |
From the VSD Configuration window, you can:
- View VSD configuration
- Add a new VSD
- Delete an existing VSD
- Modify an existing VSD
Caution: If you click Del, the VSD
is deleted without verifying that you intended to delete the VSD.
For instructions on how to perform these tasks, click the Help button on the bottom of
the VSD Configuration window. |
3 |
From the VSD - Add/Modify window, you can:
- Add or modify a name for the VSD
- Add or modify bridge ports assigned to the VSD
- Associate a VSD with a VLAN interface (this option only displays if routing is enabled)
For instructions on how to perform these tasks, click the Help button at the bottom of
the VSD - Add/Modify window. |
Managing VLAN Interfaces (VIs)
You can use the Quick Configuration Guide window to associate a VSD with a
VLAN interface (VI) to allow data from the entities in the VSD to be
routed.
Note: Routing must be
enabled before you can associate a VSD with a VLAN interface (VI).
Procedure:
Step |
Action |
1 |
Select the VLAN interface (VI) that applies
to the VSD associated with your line card: FDDI or ATM. |
2 |
From the Interface Configuration window,
select the VLAN interface that you want to configure and follow the instructions displayed
in the VLAN Interface window. |
Managing Internet Protocol (IP) Information
You can use the Quick Configuration Guide window to access information on
the IP interface address for a router's VLAN interfaces (VIs).
You can also access procedures to add or modify the IP interface address.
Procedure:
Step |
Action |
1 |
Select the IP network protocol. |
2 |
From the IP Interfaces Addresses window,
you can:
- View IP interface address information
- Add an IP interface address for a VI
- Modify an IP interface address
- Delete an IP interface address
For instructions on how to perform these tasks, click the Help button on the bottom of
the IP Interfaces Addresses window. |
3 |
From the IP Address Add/Modify window, you
can:
- Add or modify the interface number
- Add or modify the IP interface address
- Add or modify the subnet mask
- Delete an IP interface address by entering 0.0.0.0 in the IP Address field
For instructions on how to perform these tasks, click the Help button at the bottom of
the IP Address Add/Modify window. |
Managing Routing Protocols
You can use the Quick Configuration Guide window to access status and
configuration information for the following routing protocols:
You can also access procedures to enable or disable the protocol,
and add, modify, or delete a routing protocol interface.
Procedure:
Step |
Action |
1 |
Select the routing protocol: RIP or
OSPF. |
2 |
From the Routing Interface window (RIP or
OSPF), you can:
- View the routing interface status
- Add a routing interface
- Modify a routing interface
- Delete a routing interface
Caution: If you click Del, the
routing interface is deleted without verifying that you intended to delete the interface.
For instructions on how to perform these tasks, click the Help button on the bottom of
the Routing Interface window. |
3 |
From the RIP Interface Add/Modify window,
you can:
- Turn RIP on or off
- Set send and receive flags
From the OSPF Interface - Add/Modify window, you can:
- Enable or disable OSPF
- Configure interface characteristics: Transit Delay, Hello Time, Retrans Time, Priority,
Dead Time
For instructions on how to perform these tasks, click the Help button at the bottom of
the Add/Modify window. |
Understanding Terminology
The following table defines the architectural components illustrated in
the Quick Configuration Guide window. For a general overview of the VLAN architecture,
refer to the DIGITAL VNswitch 900 Series
Technical Overview.
ATM
Bridge Tunnel |
Point-to-point connection
between two legacy LAN devices across an ATM network. The GS2000 line card supports
RFC 1483, allowing the creation of as many as 16 ATM bridge tunnels on
their respective ATM ports. Either Ethernet or FDDI frames can be transported through a
single bridge tunnel. Any mix of Ethernet and FDDI bridge is allowed. |
ATM
LEC |
Component of the LAN Emulation
(LANE) service, an ATM LEC (LAN Emulation client) resides in each ATM edge-device.
Edge-devices translate Ethernet and FDDI frames
as cells onto the ATM network and reassemble cells into frames when passing data back to
the legacy network. |
Bridge
Port |
Abstract connection point,
within the systems software, to a transparent bridge. The transparent bridge
forwards data to, or receives data from, bridge ports, based on the MAC address associated
with the data. Each bridge port on a GS2000 line card is identified by a unique number. |
IP |
Internet Protocol (IP) is the
network protocol used by the GS2000 line cards. It provides a common layer for packet
switching over dissimilar networks. |
Logical
Interface |
Abstract connection point,
within the systems software, between a physical interface and a bridge port.
FDDI physical interfaces are associated with one logical
interface. An ATM physical interface is associated with 1 to 16 logical interfaces, each
of which is the connection point to either an ATM emulated LAN (ELAN), or an ATM bridge
tunnel. Each logical interface on a GS2000 line card is identified by a unique number. |
OSPF |
Open shortest path first.
Interior Gateway Protocol that replaces RIP. |
Physical
Interface |
Physical point on the line card
to which a network transmission medium (cable or fiber, for example) is connected.
Physical interfaces on GS2000 line cards include FDDI and ATM. Physical interfaces are identified by
a unique number next to each interface on the line cards front panel. |
RIP |
Routing Information Protocol.
Interior Gateway Protocol supplied with UNIX and most routers. It allows a group of
GS2000 line cards, located on a local network, to share routing information. |
VLAN |
Group of bridge ports
logically linked to define a LAN. This network configuration scheme
enables you to configure a set of devices so they logically appear to be on the same LAN
segment, although they may be physically on different segments. |
VLAN
Interface (VI) |
Abstract connection between a
VLAN and a router, enabling you to connect multiple VLANs through the router. |
VLAN
Secure Domain (VSD) |
Logical set of one or more
VLANs that operate with one spanning tree. A VLAN consists of a set of distinct bridge
ports. Each set of bridge ports is isolated from other ports on the same GS2000 line card
by blocking all unicast and multicast traffic between VSDs. GS2000 line cards presently
support one VLAN per VSD, but the VSD concept provides for expanded support of multiple
VLANs within a single VSD. In most respects, each VSD operates as a separate logical
bridge within the line card. For example, a separate instance of the spanning tree protocol
is run on each VSD. |
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