question on setting up ssh connection on a router

Hi , i am trying to set up ssh on my router and access it from putty.exe

here is part of the config i am using as a template

Username root password quazitron
enable secret jha12wsii
aaa new-model
hostname abc
clock timezone GMT 0
ip routing
ip domain-name abc
ip name-server 172.20.3.21
ip subnet-zero
no ip source-route
no ip http server
no ip http secure-server
ip classless

crypto key generate rsa

2048


interface Vlan100
 description --- Infrastructure ---
 ip address 172.26.102.238 255.255.255.192


router eigrp 100
passive-interface default
no passive-interface Vlan101
network 172.19.26.0 0.0.0.255
network 172.19.30.0 0.0.0.255
no auto-summary


int range fa0/1 - 46
description --- Clients ---
switchport mode access
switchport access vlan 100
spanning-tree portfast
 switchport mode access
 switchport port-security maximum 2
 switchport port-security aging time 2
 switchport port-security violation restrict
 switchport port-security aging type inactivity
 storm-control broadcast level 2.00
 spanning-tree portfast
 spanning-tree bpduguard enable


interface GigabitEthernet0/1
 description --- Uplink
 switchport trunk encapsulation dot1q
 switchport mode trunk


ip route 0.0.0.0 0.0.0.0 172.26.102.254 name ---->r1


line con 0
 exec-timeout 35700 0
 logging synchronous
line vty 0 4
 exec-timeout 35700 0
 logging synchronous
 transport input ssh
 transport output ssh
line vty 5 15
 exec-timeout 35700 0
 logging synchronous
 transport input ssh
 transport output ssh
!

ip access-list standard SNMP
 permit 172.18.193.30
 permit 172.20.9.50
 permit 172.20.2.36
 permit 172.24.1.30
 permit 172.21.1.95
 permit 172.20.1.87
 permit 172.20.1.86
 deny   any log

snmp-server community VvVaSDD5fZQqD6MR8CZPBY8wjMSJ3UN RO SNMP


how do i enter this 2048 value ????