Specifications

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OmniSwitch 6850 Series
IP Virtual Router Port A VLAN is available for routing traffic when a virtual router port is defined for that VLAN and at least
one active port has joined the VLAN. If a VLAN does not have a router defined, its ports are in
essence fire walled from other VLANs. Each VLAN supports one IP virtual router port and a
maximum of 1024 IP router port VLANs are allowed per switch.
MAC Router Mode
Single MAC Router Mode ONLY
The OmniSwitch 6850 operates only in single MAC router mode. In this mode, each router port VLAN
is assigned the same MAC address, which is the base chassis MAC address for the switch. As a result,
up to 1024 IP router port VLANs are supported per single switch. This also eliminates the need to
allocate additional MAC addresses if more than 32 router port VLANs are defined.
IEEE 802.1Q Alcatel-Lucent’s 802.1Q is an IEEE standard for sending frames through the network tagged with
VLAN identification. 802.1Q tagging can be configured and monitored on a single port in a switch or a
link aggregation group in a switch. 802.1Q tagging is the IEEE version of VLANs. It is a method for
segregating areas of a network into distinct VLANs. By attaching a label, or tag, to a packet, the packet
can be identified as being from a specific area or identified as being destined for a specific area.
When enabling a tagged port, you will also need to specify whether only 802.1Q tagged traffic is
allowed on the port, or whether the port accepts both tagged and untagged traffic.
“Tagged” refers to four bytes of reserved space in the header of the packet. The four bytes of “tagging”
are broken down as follows: the first two bytes indicate whether the packet is an 802.1Q packet, and
the next two bytes carry the VLAN identification (VID) and priority.
On the ingress side, packets are classified in a VLAN. After classifying a packet, the switch adds an
802.1Q header to the packet. Egress processing of packets is done by the switch hardware. Packets
have an 802.1Q tag, which may be stripped off based on 802.1Q tagging/stripping rules.
If a port is configured to be a tagged port, then all the untagged traffic (including priority tagged, or
VLAN 0 traffic) received on the port will be dropped. You do not need to reboot the switch after
changing the configuration parameters.
Priority tagged traffic, or traffic from VLAN 0, is used for Quality of Service (QoS) functionality.
802.1Q views priority tagged traffic as untagged traffic.
Mobile ports can be configured to accept 802.1Q traffic by enabling the VLAN mobile tagging feature.
The port can be assigned to as many 802.1Q VLANs as necessary, up to 4093 per port or 32768
VLAN port associations. For the purposes of Quality of Service (QoS), 802.1Q ports are always
considered to be trusted ports. 802.1Q tagging is done at wire speed, providing high-performance
throughput of tagged frames.
IEEE 802.1Q Specifications:
IEEE Specification: Draft Standard P802.1Q/D11 IEEE Standards for Local And Metropolitan Area
Network: Virtual Bridged Local Area Networks, July 30, 1998
Maximum Number of Tagged VLANs per Port: 4093
Maximum Number of Untagged VLANs per Port: one untagged VLAN per port
Maximum Number of VLAN Port Associations: 32768
What type of frames accepted: Both tagged and untagged frames are accepted
Basic IP Routing Internet Protocol (IP) is a network-layer (Layer 3) protocol that contains addressing and control
information that allow packets to be forwarded on a network. IP is the primary network-layer protocol
in the Internet protocol suite. Along with the Transmission Control Protocol (TCP), IP represents the
heart of the Internet protocols. IP is associated with several Layer 3 and Layer 4 protocols. These
protocols are built into the base code loaded on the switch and they include:
• Transmission Control Protocol (TCP)
• User Datagram Protocol (UDP)
• Bootstrap Protocol (BOOTP)/Dynamic Host Configuration Protocol (DHCP)
• Simple Network Management Protocol (SNMP)
• Telnet
• File Transfer Protocol (FTP) / Secure FTP
• Address Resolution Protocol (ARP)
• Internet Control Message Protocol (ICMP)
• RIP I / RIP II
The base IP software allows one to configure an IP router port, static routes, a default route, the
Address Resolution Protocol (ARP), the router primary address, the router ID, the Time-to-Live (TTL)
Value, IP-directed broadcasts, and the Internet Control Message Protocol (ICMP). In addition, this
software allows one to trace IP route, display Transmission Control Protocol (TCP) information, and
display User Data-gram Protocol (UDP) information.
Routing Protocols IP is a network-layer (Layer 3) protocol that contains addressing information and some control
information that enables packets to be forwarded. IP is documented in RFC 791 and is the primary
network-layer protocol in the Internet protocol suite. Along with the Transmission Control Protocol
(TCP), IP represents the heart of the Internet protocols. IP is enabled on the switch by default.
Static IP Routing is supported.
Dynamic IP Routing support: VRRP, RIPv1, RIPv2, and OSPFv2
Router Discover Protocol (RDP): The Router Discovery Protocol (RDP) is an extension of ICMP that
allows end hosts to discover routers on their networks. This implementation of RDP supports the router
requirements as defined in RFC 1256.
L3 Routing Protocols (IPv4)
IP Routing