7705 SAR Interfaces
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Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
Ethernet port-layer internal loopbacks and the down-when-looped feature can also
be enabled on the same port. When the keepalive PDU is internally looped back, it
is extracted and processed as usual. If the SRC MAC address matches the port MAC
address, the port is disabled due to detection of a loop. If the SRC MAC address is
a broadcast MAC address because the swap-src-dst-mac option in the loopback
command is enabled, then there is no change to port status and it remains
operationally up.
EFM OAM and down-when-looped cannot be enabled on the same port.
3.2.11 Ethernet Ring (Adapter Card and Module)
The 2-port 10GigE (Ethernet) Adapter card can be installed in a 7705 SAR-8 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 3.
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
• 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 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.
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