Specifications

4-4
Book Title
78-13113-06 B0
Chapter 4 Creating a Four-Node Ring Using the Uplink Cards
RPR/SRP Uplink Card—IEEE 802.17 RPR Mode
Figure 4-3 Creating an IEEE 802.17 Mode Ring Using RPR/SRP Uplink Cards
The TX span East port on Node 1 goes to the RX span West port on the next router, which will become
Node 2. The labels above the fiber connectors identify span West (left port) TX and RX, and span East
(right port) TX and RX. (See Figure 4-1.)
Create a four-node IEEE 802.17 ring by connecting the fiber-optic cables to RPR/SRP uplink cards that
are installed in routers on the network. To create a four-node IEEE 802.17 ring, perform the following
steps:
Step 1 Install an RPR/SRP uplink card in a Cisco 10720 Internet Router on the network.
Step 2 Choose a router with an RPR/SRP uplink card to become Node 1 in the four-node IEEE 802.17 ring.
Step 3 Add nodes to the ring by connecting the receive (RX) and transmit (TX) cables. The RX port on one
RPR/SRP uplink card must be connected to a TX port on the next RPR/SRP uplink card.
Node 1Node 4
ACTIVE
CARRIER
RX PKT
WRAP
PASS THRU
A B
10720-SR-LC
TX RX TX RX
ACTIVE
CARRIER
RX PKT
WRAP
PASS THRU
A B
10720-SR-LC
TX RX TX RX
Node 2
ACTIVE
CARRIER
RX PKT
WRAP
PASS THRU
A B
10720-SR-LC
TX RX TX RX
Node 3
ACTIVE
CARRIER
RX PKT
WRAP
PASS THRU
A B
10720-SR-LC
TX RX TX RX
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
57876
Table 4-2 Cable Connections for a Four-Node IEEE 802.17 Mode Ring
Cable Connections
From Node / Connector To Node / Connector
Node 1 / TX span East Node 2 / RX span West
Node 2 / TX span East Node 3 / RX spanWest
Node 3 / TX span East Node 4 / RX span West
Node 4 / TX span East Node 1 / RX span West
Node 1 / TX span West Node 4 / RX span East
Node 4 / TX span West Node 3 / RX span East