RuggedRouter User Guide
After assigning the first DLCI, you may revisit the interface through the link under
the Name field and add additional DLCIs.
Once all channels have been assigned, the “Assign” links will no longer appear, as
shown below. Note that any of the Frame Relay interfaces on a channel (in this case
w1c4fr16 and w1c4fr17) may be used to edit the Frame Relay Link Parameters.
Figure 53: T1/E1 Network Interfaces After Interface Creation
Naming Of Logical Interfaces
Webmin names the logical interfaces for you (but allows you to provide a
description). All interfaces start with a “w” to identify them as wan interfaces,
followed by the physical interface number.
Unchannelized hardware interfaces supply only one channel (that can be composed of
a varying number of timeslots) logical interface. You may configure one PPP
interface or up to 990 Frame Relay DLCI interfaces. The next part of the identifier is
either “ppp” or “frX” where X the frame relay channel number.
Channelized hardware allows more than one logical interface. The next part of the
identifier indicates the channel the interface uses with a “c” followed by the lowest
channel used. The final part of the identifier is either “ppp” or “fr” and the frame
relay channel number.
Note: Once a channel is created, and an interface is constructed on it, the name of the
interface will never change. This will remain true even if the number of timeslots on
the channel is changed. This property is desirable since interface names used by
features such as OSPF, RIP and the firewall can rely on the interface name. Channel
re-assignments can, however, lead to a non-intuitive relationship between channels
and timeslots.
Editing A T1/E1 Interface
Figure 54: Edit T1 Interface
68 RuggedCom
