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Configuring the Physical Interface
This section describes how to complete the basic configuration for a Fast Ethernet,
Gigabit Ethernet, or 10-Gigabit Ethernet interface. CLI examples are provided with
the individual command descriptions.
To configure an Ethernet interface:
1.
2.
3.
4.
5.
6.
7.
8.
debounce
NOTE: Debounce configuration is supported for all Ethernet module combinations
on E Series routers.
Configuring VLANs and stacked VLANs (S-VLANs) After you configure the
physical interface, you must decide whether to configure the Ethernet interface
with or without VLANs or S-VLANs. VLANs and S-VLANs enable you to multiplex
multiple IP interfaces and PPPoE interfaces over a single physical Ethernet port.
If you are not configuring with VLANs or S-VLANs, proceed to "Configuring
Ethernet Interfaces" on page 175.
Configuring upper-layer protocols You must determine which upper-layer
protocols, such as MPLS, to configure on the interface. This section focuses on
non-VLAN configurations. You can configure some upper-layer protocols, such
as PPPoE, with or without VLANs. For more information, see JUNOSe Link Layer
Configuration Guide .
Select an Ethernet interface.
(Optional) Specify the line speed and duplex mode.
(Optional) Specify the MTU.
(Optional) Set the time interval at which the router records bit and packet rates.
(Optional) Associate a name with the interface.
(Optional) Validate MAC addresses on a per interface basis.
(Optional) Enable the debounce timer and set the time interval that the interface
waits before reporting a state change to the upper-layer protocols.
(Optional) Modify the interval that the interface waits before reporting a state
change to the upper-layer protocols.
Use to enable the debounce configuration and set the interval, in seconds, for
which an interface must maintain a given state for example, up or down before
the interface reports the state change to the upper-layer protocols.
When a link briefly goes up or down, the momentary loss of signal can cause a
temporary service interrution for connection-oriented protocols such as PPPoE.
Configuring the debounce interval prevents the router from prematurely tearing
down and rebuilding the PPPoE connections during such brief network outages.
Chapter 5: Configuring Ethernet Interfaces
Configuring the Physical Interface
199
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