Cisco 3100 Series Hardware Installation Manual page 25

Overview
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For More Information
6-Port 1-Gb SX/10-Gb SR/10-Gb LR/25-Gb SR/25-Gb LR Network
Module with Hardware Bypass
The Secure Firewall 3100 chassis has one network module slot named NM-2. Network modules are optional,
removable I/O modules that provide either additional ports or different interface types. The network module
plugs into the chassis on the front panel. See
slot on the chassis.
The FPR3K-XNM-6X1SXF, FPR3K-XNM-6X10SRF, FPR3K-XNM-6X10LRF, FPR3K-XNM-6X25SRF,
and FPR3K-XNM-6X25LRF hardware bypass network modules have six ports that are numbered from top
to bottom, left to right. Pair ports 1 and 2, 3 and 4, and 5 and 6 to form hardware bypass paired sets. In hardware
bypass mode, data is not processed by the Secure Firewall 3100 but is routed to the paired port. This network
module has built-in SPF transceivers. Hot swapping and field replacement of transceivers are not supported.
Hardware bypass (also known as fail-to-wire) is a physical layer (Layer 1) bypass that allows paired interfaces
to go into bypass mode so that the hardware forwards packets between these port pairs without software
intervention. Hardware bypass provides network connectivity when there are software or hardware failures.
Hardware bypass is useful on ports where the secure firewall is only monitoring or logging traffic. The
6-Port 1-Gb SX/10-Gb SR/10-Gb LR/25-Gb SR/25-Gb LR Network Module with Hardware Bypass
Ethernet 2/3 and Ethernet 2/4
Ports 3 and 4 are paired together to form a
hardware bypass pair. LED B2 applies to this
paired port.
Ethernet 2/7 and Ethernet 2/8
Ports 7 and 8 are paired together to form a
hardware bypass pair. LED B4 applies to this
paired port.
Power LED
Left Port LED
• Unlit—No connection or port is not in use.
• Green—Link up.
• Green, flashing—Network activity.
• See 6-Port 1-Gb SX/10-Gb SR/10-Gb LR/25-Gb SR/25-Gb LR Network Module with Hardware
Bypass , on page 21 for a description of the 1/10/25-Gb network module.
• See 4-Port 40-Gb Network Module, on page 17
• See 8-Port 1/10/25-Gb Network Module, on page 15
module.
• See Install, Remove, and Replace the Network Module, on page 65
and replacing network modules.
4 Ethernet 2/5 and Ethernet 2/6
Ports 5 and 6 are paired together to form a
hardware bypass pair. LED B3 applies to this
paired port.
6 Captive screw
Handle
8
10 Right Port LED
• Unlit—No connection or port is not in use.
• Green—Link up.
• Green, flashing—Network activity.
for a description of the 40-Gb network module.
for a description of the 1/10/25-Gb network
Front Panel, on page 8
Cisco Secure Firewall 3100 Series Hardware Installation Guide
for the procedure for removing
for the location of the network module
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