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MII connections—Attach an MII cable directly to the MII receptacle on the GRP or attach a
•
100BASET transceiver with the media appropriate to your application to the MII port on the GRP.
(See
RJ-45 connections—Attach the Category 5 UTP cable directly to the RJ-45 receptacle on the GRP.
•
(See
The Ethernet interface on the GRP is an end station device, not a repeater; therefore, you must connect
the Ethernet interface to a repeater or hub.
Figure 10
To repeater
or DTE
To transceiver,
repeater, or DTE
To prevent problems on your system and network, do not simultaneously connect RJ-45 and MII
Caution
cables to a single GRP Ethernet interface. On a single GRP, only one Ethernet connection can be used
at a time. Only connect cables that comply with EIA/TIA-568 standards. (Refer to
Table 7
An Ethernet port is used primarily as a Telnet port into the Cisco 12000 Series Router, or for booting
Caution
or accessing Cisco IOS software images over a network to which an Ethernet port is directly
connected. Cisco Express Forwarding (CEF) functions are switched off by default for security
reasons. Cisco strongly cautions you to consider the security implications of switching on CEF
routing functions on these ports.
Figure 11
Network 2.0.0.0 via the Ethernet port (E0) on the GRP in Router A; you can only access the hosts and
Router C, which are in Network 1.0.0.0. (See dotted arrows in
To access Network 2.0.0.0 from Router A, you must use an interface port on one of your line cards (in
this example, a Packet-over-SONET (POS) line card in Router A) to go through Router B, through
Router C, and into Network 2.0.0.0. (See solid arrows in
78-4339-09
Figure
10.) Be sure to use the appropriate strain relief on cable connections.
Figure
10.)
Connecting MII or RJ-45 Cables to GRP (Vertical Orientation)
RJ-45 cable
MII cable
for cable recommendations and specifications.)
shows an example of the functionality of the Ethernet port. In this example, you cannot access
Table 6
Figure
11.)
Figure
11.)
Connecting to the Ethernet Port
Replacing a GRP
and
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