How to login with SSH without enter password

How to login with SSH without enter password
[Client]
$ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/XXXX/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again:

$scp .ssh/id_rsa.pub mylogin@192.168.1.1:.ssh/authorized_keys
Password: 

#Testing
$ssh mylogin@192.168.1.1

[Cisco] Local Switching Frame-Relay to FastEthernet

[R7 FE1/2]-------[FE0/0 R2  S2/0 DLCI 203]---------[S1/0.23 DLCI 302 R3]

[R7]
R7#sh run int f1/2
Building configuration...

Current configuration : 87 bytes
!
interface FastEthernet1/2
 no switchport
 ip address 192.168.37.7 255.255.255.0
end

======================================
[R3]
R3#sh run int s1/0.23
Building configuration...

Current configuration : 136 bytes
!
interface Serial1/0.23 point-to-point
 ip address 192.168.37.3 255.255.255.0
 frame-relay interface-dlci 302   
end
======================================
[R2]
interface FastEthernet0/0
 no ip address
 duplex full
 speed auto
 no cdp enable
 no clns route-cache
end
!
interface Serial2/0
 no ip address
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay interface-dlci 203 switched
 no clns route-cache
end
!
connect FE-FR Serial2/0 203 FastEthernet0/0 interworking ip
!
======================================
[Verify]

[R7]
R7#ping 192.168.37.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.37.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/20/44 ms

[R2]
R2#sh connection all 

ID   Name            Segment 1              Segment 2              State       
============================================================================
1    FE-FR           Se2/0 203              Fa0/0                  UP       

[Cisco] PPP Multilink Frame-Relay

[R1]
hostname R1
!
interface Multilink1
 ip address 192.168.1.1 255.255.255.0
 ppp multilink
 multilink-group 1
 no clns route-cache
!
interface Serial2/0
 no ip address
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay interface-dlci 103 ppp Virtual-Template1
 frame-relay interface-dlci 113 ppp Virtual-Template2
 no clns route-cache
!
interface Virtual-Template1
 no ip address
 ppp multilink
 multilink-group 1
 no clns route-cache
!         
interface Virtual-Template2
 no ip address
 ppp multilink
 multilink-group 1
 no clns route-cache
!

===============================================
[R3]

hostname R3
!
interface Multilink1
 ip address 192.168.1.3 255.255.255.0
 ppp multilink
 ppp multilink group 1
!
interface Serial1/0
 no ip address
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay interface-dlci 301 ppp Virtual-Template1
!
interface Serial1/1
 no ip address
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay interface-dlci 311 ppp Virtual-Template2
!
interface Virtual-Template1
 no ip address
 ppp multilink
 ppp multilink group 1
!
interface Virtual-Template2
 no ip address
 ppp multilink
 ppp multilink group 1
!

===============================================
[Verifiy]

R3#sh ppp multilink 

Multilink1, bundle name is R1
  Endpoint discriminator is R1
  Bundle up for 00:02:47, total bandwidth 200000, load 1/255
  Receive buffer limit 24000 bytes, frag timeout 1000 ms
    0/0 fragments/bytes in reassembly list
    0 lost fragments, 5 reordered
    0/0 discarded fragments/bytes, 0 lost received
    0xE received sequence, 0x10 sent sequence
  Member links: 2 active, 2 inactive (max not set, min not set)
    Vi3, since 00:02:43
    Vi1, since 00:02:38
    Vt1 (inactive)
    Vt2 (inactive)
No inactive multilink interfaces
R3#ping 192.168.1.1 

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/14/36 ms
R3#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C       192.168.1.1/32 is directly connected, Multilink1
C       192.168.1.0/24 is directly connected, Multilink1
R3#

[Cisco] Config PPPoE Server & Client,Server use VRF, Client get ip address from DHCP

hostname PPPoE-Server
!
ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.1
!
ip dhcp pool CE
   vrf CE 
   network 192.168.1.0 255.255.255.0
!
ip vrf CE
 rd 1:1
!
vpdn enable
!
vpdn-group PPPOE
 accept-dialin
  protocol pppoe
  virtual-template 1
!
username CLIENT password 0 CISCO
!
interface Ethernet0/0
 no ip address
 full-duplex
 pppoe enable
!       
interface Virtual-Template1
 ip vrf forwarding CE
 ip address 192.168.1.1 255.255.255.0
 no peer neighbor-route
 peer default ip address dhcp
 ppp authentication chap callin
 ppp chap hostname SERVER
 ppp chap password 0 CISCO
!
======================================================

hostname PPPoE-Client
!
vpdn enable
!
vpdn-group PPPOE
 request-dialin
  protocol pppoe
!
username SERVER password 0 CISCO
!
interface Ethernet0/0
 no ip address
 full-duplex
 pppoe enable
 pppoe-client dial-pool-number 1
!
interface Dialer1
 ip address dhcp
 encapsulation ppp
 dialer pool 1
 ppp chap hostname CLIENT
 ppp chap password 0 CISCO
!