RuggedCom RX1000, RX1100 manual Editing a T1/E1 Interface, Naming Of Logical Interfaces

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

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