RuggedCom RuggedRouter RX1100 - Manual (Page 60)

6. Configuring Ethernet Interfaces
Revision 1.14.3 60 RX1000/RX1100™
Source MAC address) is set to 0x8100, denoting 802.1Q (VLAN). The next 2-bytes of the VLAN tag
contain: a 3-bit User Priority Field that may be used as a priority level for Ethernet frames, a 1-bit
Canonical Format Indicator (CFI) used to indicate the presence of a Routing Information Field (RIF),
and finally the 12-bit VLAN Identifier (VID) which uniquely identifies the VLAN to which the Ethernet
frame belongs. These four bytes, known as the VLAN tag, are followed by the rest of the Ethernet
frame, starting with the length field.
6.1.2.2. RuggedRouter Functions Supporting VLANs
Functions Support Comments
Static Route and Default Route Y
Static Multicast Routing Y
End To End backup Y
PPPoE N
Shorewall Firewall Y
IPSec Y
VRRP Y
Traffic Prioritization Y
Dynamic Routing Both OSPF and RIP support VLAN
GRE Tunnel Y
DHCP Server Y
6.1.3. PPPoE On Native Ethernet Interfaces Fundamentals
RuggedRouter supports PPPoE (Point-to-Point Protocol Over Ethernet) over both external modems
(described here) and internal interfaces (described in the chapter “PPPOE On ADSL”). The PPPOE
On ADSL chapter contains more useful information on PPPOE Authentication, Addresses, DNS
Servers and MTU Issues.
Only one PPPoE interface can be created on each Ethernet Interface. Each PPPoE interface name is
assigned internally. The name is “pppX”, where X is 10 plus the native Ethernet interface the PPPoE
is created upon (e.g. a PPPoE on eth1 is ppp11).
6.1.4. IPv6 on Ethernet Fundamentals
By default, IPv6 disabled on the router, in which caseIPv6 addresses may not be assigned to Ethernet
interfaces. IPv6 may be enabled via the IPv6 Support option in Core settings under the Network
Configuration category.
If IPv6 is enabled on the router, and link is asserted on a given ethernet port, the system
will automatically assign a "link-local" address on that port beginning with 0xfe80, for example:
fe80::20a:dcff:fe1a:e401/64.
6.1.5. Bridge Fundamentals
RuggedRouter supports software-based Ethernet Bridging. The bridge appears to the router as an
Ethernet interface, and may be assigned an IP address statically or via DHCP. Network services such
as SSH, DHCP, NTP, VRRP, etc, may be configured to run on the bridge interface.