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76 Chapter 4: Configuring Asynchronous Connections with Modems
The numbering scheme for interfaces was expanded for the 3600 series routers. The console is
still line 0 and the vty ports are similarly counted after the TTYs. However, Cisco chose to use
reserved numbering for the available slots. Thus, slot 0 has reserved lines 1­32, slot 1 has
reserved lines 33­64, slot 2 has reserved lines 65­97, and so on. Each slot is given a range of
32 line numbers, whether they are used or not.
Figure 4-2 shows the rear of the chassis for a 3620 and 3640 router and the line numbers
associated with each slot.
Figure 4-2
Line Numbers for 3620 and 3640 Routers
* 5 TTY 9600/9600 - - - - - 16 6 0/0 -
* 6 TTY 9600/9600 - - - - - 12 7 0/0 -
7 TTY 9600/9600 - - - - - 3 1 0/0 -
8 TTY 9600/9600 - - - - - 0 9 0/0 -
* 9 TTY 9600/9600 - - - - - 12 0 0/0 -
* 10 TTY 9600/9600 - - - - - 16 0 0/0 -
* 11 TTY 9600/9600 - - - - - 25 2 0/0 -
* 12 TTY 9600/9600 - - - - - 5 0 0/0 -
* 13 TTY 9600/9600 - - - - - 0 0 0/0 -
14 TTY 9600/9600 - - - - - 0 2 0/0 -
15 TTY 9600/9600 - - - - - 0 0 0/0 -
16 TTY 9600/9600 - - - - - 3 0 0/0 -
17 AUX 9600/9600 - - - - - 0 0 0/0 -
18 VTY - - - - - 0 0 0/0 -
19 VTY - - - - - 0 0 0/0 -
20 VTY - - - - - 0 0 0/0 -
21 VTY - - - - - 0 0 0/0 -
22 VTY - - - - - 0 0 0/0 -
Example 4-1
show line Output for Cisco 2511 Router (Continued)