Datasheet
1-19
PA-4E1G Serial Port Adapter Installation and Configuration
OL-3065-05
Chapter 1 Overview
Identifying Interface Addresses
Cisco 7505 routers have four slots for port adapters, and one slot for an RSP. The slots are numbered
from bottom to top. You can place a port adapter in any of the VIP interface slots (slot 0 through 3). One
slot is always reserved for the RSP. Figure 1-25 shows the slot numbering on a Cisco 7505 router.
Figure 1-25 VIP Slots in the Cisco 7505 Router
Cisco 7507 routers have five slots for port adapters, and two slots for RSPs. The slots are numbered from
left to right. You can place a port adapter in any of the VIP interface slots (slot 0, 1, 4, 5, or 6). Slots 2
and 3 are always reserved for RSPs. The Cisco 7507 router is not shown.
Cisco 7513 routers have eleven slots for port adapters, and two slots for RSPs. The slots are numbered
from left to right. You can place a port adapter in any of the VIP interface slots (slots 0 through 5, or
slots 9 through 12). Slots 6 and 7 are always reserved for RSPs. The Cisco 7513 router is not shown.
Identifying Interface Addresses
This section describes how to identify interface addresses for the PA-4E1G in supported platforms.
Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on a PA-4E1G installed in a router maintain the same address regardless of whether other port
adapters are installed or removed. However, when you move a port adapter to a different slot, the first
number in the interface address changes to reflect the new port adapter slot number.
Interfaces on a PA-4E1G installed in a VIP maintain the same address regardless of whether other
interface processors are installed or removed. However, when you move a VIP to a different slot, the
interface processor slot number changes to reflect the new interface processor slot.
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Slot 0
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Slot 2
Slot 3
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VIP in interface processor slot 3