Cisco 10720 - Internet Router Installation And Configuration Manual page 65

Chapter 3 Installing the Cisco 10720 Internet Router
Figure 3-15
Node 4
Step 1 Install a DPT uplink card in a Cisco 10720 Internet Router on the network.
Step 2 Choose a router with an uplink card to become Node 1 in the four-node DPT ring.
Note
Step 3 Add other nodes to the ring by connecting the receive (RX) and transmit (TX) cables. The RX port on
one uplink card must be connected to a TX port on the next uplink card. (See
Use Figure 3-15
Figure 3-16
78-13062-10
Creating a DPT Ring Using Uplink Line Cards
Node 3
Tx Tx
Rx Rx
Tx Tx
Rx Rx
The TX side B port on Node 1 goes to the RX side A port on the next router, which will become
Node 2. The labels above the fiber connectors identify side A (left port) TX and RX, and side B
(right port) TX and RX. (See
and Table 3-1 to help organize the cable connections for a four-node DPT ring.
provides a view of the network when a four-node DPT ring is created.
Node 2
Tx
Rx
Tx
Rx
Figure 3-15.)
Cisco 10720 Internet Router Installation and Configuration Guide
Creating a Four-Node DPT Ring
Node 1
Tx
Rx
Tx
Rx
Figure 3-15.)
3-15