The 2-port 10GigE (Ethernet) Adapter card can be installed in a 7705 SAR-8 Shelf V2 or 7705 SAR-18 chassis and the 2-port 10GigE (Ethernet) module can be installed in a 7705 SAR-M to connect to and from access rings carrying a high concentration of traffic. For the maximum number of cards or modules supported per chassis, see Table: Maximum Number of Cards/Modules Supported in Each Chassis.
A number of 7705 SAR nodes in a ring typically aggregate traffic from customer sites, map the traffic to a service, and connect to an SR node. The SR node acts as a gateway point out of the ring. A 10GigE ring allows for higher bandwidth services and aggregation on a per-7705 SAR basis. The 2-port 10GigE (Ethernet) Adapter card/module increases the capacity of backhaul networks by providing 10GigE support on the aggregation nodes, thus increasing the port capacity.
In a deployment of a 2-port 10GigE (Ethernet) Adapter card/module, each 7705 SAR node in the ring is connected to the east and west side of the ring over two different 10GigE ports. If 10GigE is the main uplink, the following are required for redundancy:
two cards per 7705 SAR-8 Shelf V2
two cards per 7705 SAR-18
two 7705 SAR-M nodes, each equipped with 2-port 10GigE (Ethernet) module
With two cards per 7705 SAR-8 Shelf V2 or 7705 SAR-18 node, for example, east and west links of the ring can be terminated on two different adapter cards, reducing the impact of potential hardware failure.
The physical ports on the 2-port 10GigE (Ethernet) Adapter card/module boot up in network mode and this network setting cannot be disabled or altered. At boot-up, the MAC address of the virtual port (v-port) is programmed automatically for efficiency and security reasons.
There is native built-in Ethernet bridging among the ring ports and the v-port. Bridging destinations for traffic received from one of the ring ports include the 10GigE ring port and the network interfaces on the v-port. Bridging destinations for traffic received from the v-port include one or both of the 10GigE ring ports.
With bridging, broadcast and multicast frames are forwarded over all ports except the received one. Unknown frames are forwarded to both 10GigE ports if received from the v-port or forwarded to the other 10GigE port only if received from one of the 10GigE ports (the local v-port MAC address is always programmed).
The bridge traffic of the physical 10GigE ports is based on learned and programmed MAC addresses.