Hi Paolo,
thank you for your answer. I tried removing all security commands, but still the same.
Something I don´t like is I get nothing when executing "show pppoe session", and virtual-access interface is always down.
About IOS version, 12.4(20)T6 is now running. To get newer version I need a service contract I don´t have.
SR520#show deb
PPPoE:
PPPoE protocol events debugging is on
PPPoE control packets debugging is on
SR520#term mon
SR520#show pppoe sess
SR520#show pppoe summ
SR520#show ip inter brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES unset up up
FastEthernet1 unassigned YES unset up down
FastEthernet2 unassigned YES unset up down
FastEthernet3 unassigned YES unset up down
FastEthernet4 172.31.2.1 YES NVRAM up up
NVI0 172.31.2.1 YES unset up up
Virtual-Access1 unassigned YES unset down down
Virtual-Template1 172.31.2.1 YES TFTP down down
Vlan1 unassigned YES NVRAM up down
Vlan75 172.16.0.1 YES NVRAM up up
Vlan76 172.16.1.1 YES NVRAM up down
Vlan77 172.16.2.1 YES NVRAM up down
Vlan78 unassigned YES NVRAM up down
Vlan79 unassigned YES NVRAM up down
SR520#show run
Building configuration...
Current configuration : 3695 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SR520
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
enable secret 5 $1$dom0$tWAokJnzOvuSrgH2vPVC21
!
no aaa new-model
!
crypto pki trustpoint TP-self-signed-1508651344
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1508651344
revocation-check none
rsakeypair TP-self-signed-1508651344
!
!
crypto pki certificate chain TP-self-signed-1508651344
certificate self-signed 01
3082023D 308201A6 A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 31353038 36353133 3434301E 170D3032 30333036 30333030
34325A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 35303836
35313334 3430819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
81009C5B 85195357 642EAFD1 E2CEAEE9 92BB8207 15F3D20E 270D0FFF 6B0E3B91
2CBC42A0 540C3A1D BD11D85A D67B7CAE 36EC71E2 50C29A8E E83ECA03 80BD3B69
65E557F1 B4886BF6 36A319B0 E0865DED 3091B7B0 969D66CF B98F5909 2E95CD95
C5F28F78 29DF96F3 DDEDF18E 6088F54A 501D8062 F6C10CF5 3E07DE9F 0A534A81
50770203 010001A3 65306330 0F060355 1D130101 FF040530 030101FF 30100603
551D1104 09300782 05535235 3230301F 0603551D 23041830 1680146E FD6DDD8F
EC1220FF 0EABA56B 1668A2C7 9FE85A30 1D060355 1D0E0416 04146EFD 6DDD8FEC
1220FF0E ABA56B16 68A2C79F E85A300D 06092A86 4886F70D 01010405 00038181
00600546 83E2FE69 BDBC3F87 9B71FF8A 3F0E9C5A 4EE7C304 7CB53591 5F0C0BA8
616C209D 3C427708 251C3AC7 69AEC4AB 5F21296C 8BF7B3EA 97393BA1 64CD7BAD
CE0A40BD A271B426 0A01E498 01F0F32D 8665232A F09D88C3 48411E3B 7928C787
AA1A7292 6AC686B0 ECB65A43 E511B398 41BFEFEB 553974BF 0BDBB0D2 E83BA538 CC
quit
dot11 syslog
ip source-route
!
!
ip dhcp excluded-address 172.31.2.1
!
ip dhcp pool DHCP_VLAN75
network 172.16.0.0 255.255.255.0
default-router 172.16.0.1
!
ip dhcp pool poolpppoe
network 172.31.2.0 255.255.255.0
!
!
ip cef
ip name-server 8.8.8.8
ip name-server 8.8.4.4
!
no ipv6 cef
multilink bundle-name authenticated
!
!
username cisco privilege 15 secret 5 $1$5Zs7$mUcUCddFZ32hT9dxIFbuD/
!
!
!
archive
log config
logging enable
logging size 600
hidekeys
!
!
!
!
bba-group pppoe global
virtual-template 1
!
!
interface FastEthernet0
switchport access vlan 75
!
interface FastEthernet1
switchport access vlan 76
!
interface FastEthernet2
switchport access vlan 77
!
interface FastEthernet3
!
interface FastEthernet4
ip address 172.31.2.1 255.255.255.0
ip virtual-reassembly
load-interval 30
duplex auto
speed auto
pppoe enable group global
!
interface Virtual-Template1
mtu 1492
ip unnumbered FastEthernet4
peer default ip address dhcp-pool poolpppoe
!
interface Vlan1
no ip address
!
interface Vlan75
ip address 172.16.0.1 255.255.255.0
ip virtual-reassembly
!
interface Vlan76
ip address 172.16.1.1 255.255.255.0
ip virtual-reassembly
!
interface Vlan77
ip address 172.16.2.1 255.255.255.0
ip virtual-reassembly
!
interface Vlan78
no ip address
!
interface Vlan79
no ip address
!
ip forward-protocol nd
!
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat inside source list 1 interface FastEthernet4 overload
!
!
!
!
!
!
control-plane
!
banner login ^CSR520 Base Config - MFG 1.0 ^C
!
line con 0
login local
no modem enable
line aux 0
line vty 0 4
privilege level 15
login local
transport input telnet ssh
!
scheduler max-task-time 5000
end
