Green - Home Lab Setup problem - Help Appreciated

Question

Below you will find my config for a 2520 Router and an AS2509-RJ. I am attempting to reverse telnet from my AS to 2520. However when I try this I end up telnetting back to the AS. (Very confusing, but confirmed as the only password accepted is test1.)
From my AS I am entering:
Telnet R1 2001
Note: Setup is as follows.
AS(RJ45-1) via Rolled cable to 2520 (console port)
Can someone help me out?
R1_2520 Config:
Current configuration : 760 bytes
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname R1_2520
enable secret xxx
enable password xxx
ip subnet-zero
ip tftp source-interface Ethernet0
interface Loopback0
ip address 169.1.x.x.255.255.255
interface Ethernet0
ip address 10.1.1.1 255.255.0.0
interface Serial0
no ip address
no ip mroute-cache
shutdown
interface Serial1
no ip address
shutdown
interface Serial2
no ip address
shutdown
interface Serial3
no ip address
shutdown
interface BRI0
no ip address
shutdown
ip classless
no ip httpserver
line con 0
line aux 0
line vty 0 4
password xxx
login
end
R0_2509 Config:
Current configuration : 976 bytes
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname R0_2509
enable secret xxx
enable password xxx
ip subnet-zero
no ip domain-lookup
ip host R1 2001 10.101.1.1
interface Loopback0
ip address 10.101.1.1 255.255.255.255
interface Ethernet0
ip address 10.10.10.10 255.255.0.0
no ip mroute-cache
shutdown
no cdp enable
interface Serial0
no ip address
no ip mroute-cache
shutdown
interface Group-Async0
ip unnumbered Ethernet0
async mode interactive
group-range 1 8
ip classless
ip httpserver
dialer-list 1 protocol ip permit
dialer-list 1 protocol ipx permit
no cdp run
line con 0
password test1
login
no exec
transport preferred telnet
line 1 8
password test1
login
no exec
transport preferred telnet
line aux 0
line vty 0 4
password lions
login
no exec
transport preferred telnet
end
Debug Info from Telnet:
4d20h: TCB001E7458 created
4d20h: TCB001E7458 setting property TCP_TOS (11) 273F4F
4d20h: TCB001E7458 bound to UNKNOWN.11073
4d20h: TCP: sending SYN, seq 541398595, ack 0
4d20h: TCP0: Connection to 10.101.1.1:2001, advertising MSS 1474
4d20h: tcp0: O CLOSED 10.101.1.1:2001 10.101.1.1:11073 seq 541398595
OPTS 4 SYN WIN 4128
4d20h: IP: s=10.101.1.1 (local), d=10.101.1.1 (Loopback0), len 44, sending
4d20h: TCP0: state was CLOSED -> SYNSENT [11073 -> 10.101.1.1(2001)]
4d20h: IP: s=10.101.1.1 (Loopback0), d=10.101.1.1 (Loopback0), len 44, rcvd 3
4d20h: tcp0: I LISTEN 10.101.1.1:11073 10.101.1.1:2001 seq 541398595
OPTS 4 SYN WIN 4128
4d20h: TCP: connection attempt to port 2001
4d20h: TCP: sending RST, seq 0, ack 541398596
4d20h: TCP: sent RST to 10.101.1.1:11073 from 10.101.1.1:2001
4d20h: IP: s=10.101.1.1 (local), d=10.101.1.1 (Loopback0), len 40, sending
4d20h: IP: s=10.101.1.1 (Loopback0), d=10.101.1.1 (Loopback0), len 40, rcvd 3
4d20h: tcp0: I SYNSENT 10.101.1.1:2001 10.101.1.1:11073 seq 0
ACK 541398596 RST WIN 0
4d20h: TCP0: state was SYNSENT -> CLOSED [11073 -> 10.101.1.1(2001)]
4d20h: TCP0: bad seg from 10.101.1.1 -- closing connection: seq 0 ack 541398596 rcvnxt 0 rcvwnd 0
4d20h: TCP0: connection closed - remote sent RST
4d20h: TCB 0x1E7458 destroyed

Answer 1

So, now we're sure the connection is broken. Let's analyze the problem this way.
There are 3 components in this connection:
1.The 2520's console port
2.rollover cable
3.The 2509's line ports
If one of the above components have any problem, it will cause a broken connection.
First let's check the 2520's console port. Can you login to the 2520 by directly conecting the console port to your PC? If so, this can be excluded from being a probable cause.
Second, change the rollover cable. Is it improved then? If so, the rollover cable you were using is bad. If not, the rollover cable can be likely excluded from being the probable cause.(One possibility is that all the rollver you have are bad, but not likely)
Third, plug your rollover cable to line 2, then type "telnet 10.101.1.1 2002", and see whether you can login to the 2520. If not, repeat the process on line 3, line4 ,...,and line 8.
If all the 8 lines cannot be used, there is the last chance. Remember your aux port? It's your line 9. Before repeat the above process, add some command lines in your confiuration:
line aux 0
no exec
transport preffered telnet
then type "telnet 10.101.1.1 2009
Good lucks
SSLIN
(I have had the same problem before; it's just the cable problem)