Cisco Systems 274 Manuale Utente

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Chapter 4      WAVE Inline Network Adapter
  Inline Network Adapter Cabling Requirements
4-4
Cisco Wide Area Virtualization Engine 274 and 474 Hardware Installation Guide
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Inline Network Adapter Cabling Requirements
The inline network adapter ships with two types of cables: crossover and 
straight-through. When you connect the WAVE inline network adapter, the cable 
that you use depends on the link speed (Gigabit Ethernet or Fast Ethernet) and the 
types of devices (DCE or DTE) being connected. 
Note
You must retain the same link speed from one end of the connection to the other 
end. Inline adapter interfaces are able to autonegotiate link speeds. If you 
configure any of your connecting interfaces for Fast Ethernet (whether on a switch 
or a router), your WAVE inline adapter uses Fast Ethernet. If you configure any 
of your connecting interfaces for Gigabit Ethernet, your WAVE inline adapter 
uses Gigabit Ethernet. Speed and duplex settings are port specific so that two 
inline ports can negotiate different speeds independently.
If you are connecting a WAVE inline appliance between two devices using Gigabit 
Ethernet, you can use either straight-through cables, crossover cables, or any 
combination of the two cable types, regardless of the type of device. However, for 
consistency, we recommend that you use straight-through cables for all Gigabit 
Ethernet connections.
 shows the cable requirements for WAVE appliance and non-WAVE 
appliance connections when you are using Gigabit Ethernet end to end.
Table 4-2
Cable Requirements for WAVE Connections Using Gigabit 
Ethernet 
Connection
Required Cable
Switch to switch (no WAVE)
Crossover or straight-through
Switch to router (no WAVE)
Crossover or straight-through
Router to router (no WAVE)
Crossover or straight-through
Switch to WAVE and
WAVE to Router
Crossover or straight-through
Crossover or straight-through
Switch to WAVE and 
WAVE to Switch
Crossover or straight-through
Crossover or straight-through