HDLC#1 - Header Compression

Configure header on HDLC link:

R2(config)#interface serial1/0
R2(config-if)#compress ?
  stac  stac compression algorithm
 

R2(config-if)#compress stac
R2(config-if)#end
R2#

This is for header compression, not for data compression.

Must be configured on both sides.

Reading-list#1

http://tools.ietf.org/html/rfc1661 - The Point-to-Point Protocol (PPP)
http://tools.ietf.org/html/rfc2153 - PPP Vendor Extensions
http://tools.ietf.org/html/rfc1994 - PPP Challenge Handshake Authentication Protocol (CHAP)
http://tools.ietf.org/html/rfc1334 - PPP Authentication Protocols
~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=
http://tools.ietf.org/html/rfc2516 - A Method for Transmitting PPP Over Ethernet (PPPoE)
http://tools.ietf.org/html/rfc2684 - Multiprotocol Encapsulation over ATM Adaptation Layer 5
http://tools.ietf.org/html/rfc2131 - Dynamic Host Configuration Protocol
~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=
http://tools.ietf.org/html/rfc2865 - RADIUS Remote Access Dial In User Service
http://tools.ietf.org/html/rfc2866 - RADIUS Accounting
~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=
http://tools.ietf.org/html/rfc1321 - The MD5 Message-Digest Algorithm
~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=
http://tools.ietf.org/html/rfc2661 - Layer Two Tunneling Protocol "L2TP"

RFC1483 - DHCP Server & Relay

LAB#1:
BrAS
!
hostname BrAS
!
ip dhcp excluded-address 192.168.1.1
!
ip dhcp pool Pool-DHCP1
   network 192.168.1.0 255.255.255.0
   default-router 192.168.1.1
!
interface Loopback0
 ip address 192.168.1.1 255.255.255.0
!
interface FastEthernet1/0
 no ip address
 duplex auto
 speed auto
 no keepalive
!
interface FastEthernet1/0.203
 encapsulation dot1Q 203
 ip address 192.168.23.2 255.255.255.0

!
interface ATM2/0
 no ip address
 no atm ilmi-keepalive
!         
interface ATM2/0.1 point-to-point
 ip unnumbered Loopback4000
 atm route-bridged ip
 pvc 1/35 
  no broadcast
  encapsulation aal5snap
!
ip route 0.0.0.0 0.0.0.0 192.168.23.3 name GW1
!


CPE:
!
hostname CPE
!

interface FastEthernet1/0
 no shutdown
 no ip address
 duplex auto
 speed auto
 no keepalive
!

interface ATM2/0
 no ip address
 no atm ilmi-keepalive
!
interface ATM2/0.1 point-to-point
 ip address dhcp client-id FastEthernet1/0
 atm route-bridged ip
 pvc 1/35 
  broadcast
  encapsulation aal5snap
!        


GW1:

!

hostname GW1

!

interface Loopback0

 ip address 1.1.1.1 255.255.255.0

!

interface FastEthernet1/0

 no ip address

 duplex auto

 speed auto

 no keepalive

!

interface FastEthernet1/0.203

 encapsulation dot1Q 203

 ip address 192.168.23.3 255.255.255.0

!

ip route 192.168.1.0 255.255.255.0 192.168.23.2 name GW1

!

LAB#2:

CPE1:


hostname CPE1
!
interface FastEthernet0/0
 mac-address aaaa.aaaa.aaaa
 no ip address
 duplex half
!
interface ATM1/0
 no ip address
 no atm ilmi-keepalive
!
interface ATM1/0.1 point-to-point
 ip address dhcp client-id FastEthernet0/0
 atm route-bridged ip
 pvc 1/41
  encapsulation aal5snap
 !
!


CPE2:

hostname CPE2

!

interface FastEthernet0/0

 mac-address aaaa.aaaa.aaab

 no ip address

 duplex half

!

interface ATM1/0

 no ip address

 no atm ilmi-keepalive

!

interface ATM1/0.1 point-to-point

 ip address dhcp client-id FastEthernet0/0

 atm route-bridged ip

 pvc 1/42 

  encapsulation aal5snap

 !

!

CPE3:

hostname CPE3

!

interface FastEthernet0/0

 mac-address aaaa.aaaa.aaac

 no ip address

 duplex half

!

interface ATM1/0

 no ip address

 no atm ilmi-keepalive

!

interface ATM1/0.1 point-to-point

 ip address dhcp client-id FastEthernet0/0

 atm route-bridged ip

 pvc 1/43

  encapsulation aal5snap

 !

!

BrAS:

hostname BrAS

!

interface Loopback0

 ip address 150.0.0.1 255.255.255.255

!

interface Loopback4000

 ip address 192.168.1.1 255.255.255.0

!

interface FastEthernet0/0

 ip address 192.168.45.4 255.255.255.0

 duplex full

!

interface ATM1/0

 no ip address

 no atm ilmi-keepalive

!

interface ATM1/0.1 point-to-point

 ip unnumbered Loopback4000

 ip helper-address 150.0.0.50

 atm route-bridged ip

 range pvc 1/32 1/52

  encapsulation aal5snap

 !

!

ip route 0.0.0.0 0.0.0.0 192.168.45.5 name DHCPSrv-GW

DHCPSrv-GW:

hostname DHCPSrv-GW

!

ip dhcp pool DHCP1

   network 192.168.1.0 255.255.255.0

   default-router 192.168.1.1 

!

interface Loopback0

 ip address 150.0.0.50 255.255.255.255

!

interface Loopback9000

 ip address 91.151.112.9 255.255.255.255

!

interface FastEthernet0/0

 ip address 192.168.45.5 255.255.255.0

 duplex full

!         

ip route 150.0.0.1 255.255.255.255 192.168.45.4 name BrAS

ip route 192.168.1.0 255.255.255.0 192.168.45.4 name CPE

!

Debugs/Outputs:

CPE1#debug dhcp detail 
DHCP client activity debugging is on (detailed)
CPE1#release dhcp ATM1/0.1


*Jan 14 21:18:13.511: DHCP: Release IPL called for interface ATM1/0.1 in state 5
*Jan 14 21:18:13.511: DHCP: SRelease attempt # 1 for entry:
*Jan 14 21:18:13.511: Temp IP addr: 192.168.1.5  for peer on Interface: ATM1/0.1
*Jan 14 21:18:13.511: Temp  sub net mask: 255.255.255.0
*Jan 14 21:18:13.515:    DHCP Lease server: 192.168.1.1, state: 10 Releasing
*Jan 14 21:18:13.515:    DHCP transaction id: 2185
*Jan 14 21:18:13.515:    Lease: 86400 secs,  Renewal: 43200 secs,  Rebind: 75600 secs
*Jan 14 21:18:13.515: Temp default-gateway addr: 192.168.1.1
*Jan 14 21:18:13.519:    Next timer fires after: 00:00:02
*Jan 14 21:18:13.519:    Retry count: 1   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:18:13.519:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:18:13.519:    Hostname: CPE1
*Jan 14 21:18:13.519: DHCP: SRelease placed Server ID option: 192.168.1.1
*Jan 14 21:18:13.519: DHCP: SRelease: 259 bytes
*Jan 14 21:18:14.707: DHCP: SRelease attempt # 2 for entry:
*Jan 14 21:18:14.707: Temp IP addr: 192.168.1.5  for peer on Interface: ATM1/0.1
*Jan 14 21:18:14.707: Temp  sub net mask: 255.255.255.0
*Jan 14 21:18:14.707:    DHCP Lease server: 192.168.1.1, state: 10 Releasing
*Jan 14 21:18:14.711:    DHCP transaction id: 2185
*Jan 14 21:18:14.711:    Lease: 86400 secs,  Renewal: 43200 secs,  Rebind: 75600 secs
*Jan 14 21:18:14.711: Temp default-gateway addr: 192.168.1.1
*Jan 14 21:18:14.711:    Next timer fires after: 00:00:02
*Jan 14 21:18:14.711:    Retry count: 2   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:18:14.711:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:18:14.711:    Hostname: CPE1
*Jan 14 21:18:14.711: DHCP: SRelease placed Server ID option: 192.168.1.1
*Jan 14 21:18:14.711: DHCP: SRelease: 259 bytes
*Jan 14 21:18:16.707: DHCP: SRelease attempt # 3 for entry:
*Jan 14 21:18:16.707: Temp IP addr: 192.168.1.5  for peer on Interface: ATM1/0.1
*Jan 14 21:18:16.707: Temp  sub net mask: 255.255.255.0
*Jan 14 21:18:16.707:    DHCP Lease server: 192.168.1.1, state: 10 Releasing
*Jan 14 21:18:16.711:    DHCP transaction id: 2185
*Jan 14 21:18:16.711:    Lease: 86400 secs,  Renewal: 43200 secs,  Rebind: 75600 secs
*Jan 14 21:18:16.711: Temp default-gateway addr: 192.168.1.1
*Jan 14 21:18:16.711:    Next timer fires after: 00:00:02
*Jan 14 21:18:16.711:    Retry count: 3   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:18:16.715:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:18:16.715:    Hostname: CPE1
*Jan 14 21:18:16.715: DHCP: SRelease placed Server ID option: 192.168.1.1
*Jan 14 21:18:16.719: DHCP: SRelease: 259 bytes
*Jan 14 21:18:18.707: DHCP: Releasing ipl options:
*Jan 14 21:18:18.707:   Clearing default gateway and route to 192.168.1.1
*Jan 14 21:18:18.707:   Removing old default route 192.168.1.1
*Jan 14 21:18:19.095: RAC: DHCP stopped on interface ATM1/0.1
*Jan 14 21:18:49.707: DHCP: QScan: Purging entry
*Jan 14 21:18:49.707: DHCP: deleting entry 67484D00 192.168.1.5 from list
*Jan 14 21:18:49.707: Temp IP addr: 192.168.1.5  for peer on Interface: ATM1/0.1
*Jan 14 21:18:49.707: Temp  sub net mask: 255.255.255.0
*Jan 14 21:18:49.711:    DHCP Lease server: 192.168.1.1, state: 11 Purging
*Jan 14 21:18:49.711:    DHCP transaction id: 2185
*Jan 14 21:18:49.711:    Lease: 86400 secs,  Renewal: 43200 secs,  Rebind: 75600 secs
*Jan 14 21:18:49.711:    No timer running
*Jan 14 21:18:49.711:    Retry count: 0   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:18:49.711:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:18:49.715:    Hostname: CPE1



BrAS#debug ip dhcp server packet detail 
DHCP server packet detail debugging is on.
BrAS#
*Jan 14 21:18:14.743: DHCPD: setting giaddr to 192.168.1.1.
*Jan 14 21:18:14.743: DHCPD: adding relay information option.
*Jan 14 21:18:14.747: DHCPD: relay information option content (add/replace):
*Jan 14 21:18:14.747:  DHCPD: 520e020c010100000000000010010029
*Jan 14 21:18:14.747: DHCPD: BOOTREQUEST from 01aa.aaaa.aaaa.aa forwarded to 150.0.0.50.
*Jan 14 21:18:16.755: DHCPD: setting giaddr to 192.168.1.1.
*Jan 14 21:18:16.755: DHCPD: adding relay information option.
*Jan 14 21:18:16.755: DHCPD: relay information option content (add/replace):
*Jan 14 21:18:16.755:  DHCPD: 520e020c010100000000000010010029
*Jan 14 21:18:16.759: DHCPD: BOOTREQUEST from 01aa.aaaa.aaaa.aa forwarded to 150.0.0.50.
BrAS#


DHCPSrv-GW#debug ip dhcp server packet detail
DHCPSrv-GW#
*Jan 14 21:18:14.735: DHCPD: DHCPRELEASE message received from client 01aa.aaaa.aaaa.aa (192.168.1.5).
*Jan 14 21:18:16.743: DHCPD: DHCPRELEASE message received from client 01aa.aaaa.aaaa.aa (192.168.1.5).
*Jan 14 21:18:16.743: DHCPD: Finding a relay for client 01aa.aaaa.aaaa.aa through relay 192.168.1.1.
DHCP server packet detail debugging is on.
DHCPSrv-GW#

CPE1#
CPE1#renew dhcp ATM1/0.1
*Jan 14 21:20:01.251: DHCP: DHCP client process started: 10
*Jan 14 21:20:01.263: RAC: Starting DHCP discover on ATM1/0.1
*Jan 14 21:20:01.263: DHCP: Try 1 to acquire address for ATM1/0.1
*Jan 14 21:20:01.283: DHCP: allocate request
*Jan 14 21:20:01.283: DHCP: new entry. add to queue, interface ATM1/0.1
*Jan 14 21:20:01.283: DHCP: SDiscover attempt # 1 for entry:
*Jan 14 21:20:01.283: Temp IP addr: 0.0.0.0  for peer on Interface: ATM1/0.1
*Jan 14 21:20:01.287: Temp  sub net mask: 0.0.0.0
*Jan 14 21:20:01.287:    DHCP Lease server: 0.0.0.0, state: 3 Selecting
*Jan 14 21:20:01.287:    DHCP transaction id: 100C
*Jan 14 21:20:01.287:    Lease: 0 secs,  Renewal: 0 secs,  Rebind: 0 secs
*Jan 14 21:20:01.287:    Next timer fires after: 00:00:04
*Jan 14 21:20:01.291:    Retry count: 1   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:20:01.291:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:20:01.291:    Hostname: CPE1
*Jan 14 21:20:01.295: DHCP: SDiscover: sending 273 byte length DHCP packet
*Jan 14 21:20:01.295: DHCP: SDiscover 273 bytes 
*Jan 14 21:20:01.295:             B'cast on ATM1/0.1 interface from 0.0.0.0
*Jan 14 21:20:03.471: DHCP: Received a BOOTREP pkt
*Jan 14 21:20:03.471: DHCP: Scan: Message type: DHCP Offer
*Jan 14 21:20:03.471: DHCP: Scan: Server ID Option: 192.168.1.1 = C0A80101
*Jan 14 21:20:03.471: DHCP: Scan: Lease Time: 86400
*Jan 14 21:20:03.475: DHCP: Scan: Renewal time: 43200
*Jan 14 21:20:03.475: DHCP: Scan: Rebind time: 75600
*Jan 14 21:20:03.475: DHCP: Scan: Subnet Address Option: 255.255.255.0
*Jan 14 21:20:03.475: DHCP: Scan: Router Option: 192.168.1.1
*Jan 14 21:20:03.475: DHCP: rcvd pkt source: 192.168.1.1,  destination:  255.255.255.255
*Jan 14 21:20:03.479:    UDP  sport: 43,  dport: 44,  length: 308
*Jan 14 21:20:03.479:    DHCP op: 2, htype: 1, hlen: 6, hops: 0
*Jan 14 21:20:03.479:    DHCP server identifier: 192.168.1.1
*Jan 14 21:20:03.479:         xid: 100C, secs: 0, flags: 8000
*Jan 14 21:20:03.479:         client: 0.0.0.0, your: 192.168.1.6
*Jan 14 21:20:03.479:         srvr:   0.0.0.0, gw: 192.168.1.1
*Jan 14 21:20:03.483:         options block length: 60
*Jan 14 21:20:03.483: DHCP Offer Message   Offered Address: 192.168.1.6
*Jan 14 21:20:03.483: DHCP: Lease Seconds: 86400    Renewal secs:  43200    Rebind secs:   75600
*Jan 14 21:20:03.487: DHCP: Server ID Option: 192.168.1.1
*Jan 14 21:20:03.487: DHCP: offer received from 192.168.1.1
*Jan 14 21:20:03.487: DHCP: SRequest attempt # 1 for entry:
*Jan 14 21:20:03.487: Temp IP addr: 192.168.1.6  for peer on Interface: ATM1/0.1
*Jan 14 21:20:03.487: Temp  sub net mask: 255.255.255.0
*Jan 14 21:20:03.491:    DHCP Lease server: 192.168.1.1, state: 4 Requesting
*Jan 14 21:20:03.491:    DHCP transaction id: 100C
*Jan 14 21:20:03.491:    Lease: 86400 secs,  Renewal: 0 secs,  Rebind: 0 secs
*Jan 14 21:20:03.491:    Next timer fires after: 00:00:03
*Jan 14 21:20:03.491:    Retry count: 1   Client-ID: aaaa.aaaa.aaaa
*Jan 14 21:20:03.495:    Client-ID hex dump: AAAAAAAAAAAA
*Jan 14 21:20:03.495:    Hostname: CPE1
*Jan 14 21:20:03.495: DHCP: SRequest- Server ID option: 192.168.1.1
*Jan 14 21:20:03.499: DHCP: SRequest- Requested IP addr option: 192.168.1.6
*Jan 14 21:20:03.499: DHCP: SRequest placed lease len option: 86400
*Jan 14 21:20:03.499: DHCP: SRequest: 291 bytes
*Jan 14 21:20:03.499: DHCP: SRequest: 291 bytes
*Jan 14 21:20:03.499:             B'cast on ATM1/0.1 interface from 0.0.0.0
*Jan 14 21:20:03.623: DHCP: Received a BOOTREP pkt
*Jan 14 21:20:03.627: DHCP: Scan: Message type: DHCP Ack
*Jan 14 21:20:03.627: DHCP: Scan: Server ID Option: 192.168.1.1 = C0A80101
*Jan 14 21:20:03.627: DHCP: Scan: Lease Time: 86400
*Jan 14 21:20:03.627: DHCP: Scan: Renewal time: 43200
*Jan 14 21:20:03.627: DHCP: Scan: Rebind time: 75600
*Jan 14 21:20:03.627: DHCP: Scan: Subnet Address Option: 255.255.255.0
*Jan 14 21:20:03.631: DHCP: Scan: Router Option: 192.168.1.1
*Jan 14 21:20:03.631: DHCP: rcvd pkt source: 192.168.1.1,  destination:  255.255.255.255
*Jan 14 21:20:03.631:    UDP  sport: 43,  dport: 44,  length: 308
*Jan 14 21:20:03.631:    DHCP op: 2, htype: 1, hlen: 6, hops: 0
*Jan 14 21:20:03.631:    DHCP server identifier: 192.168.1.1
*Jan 14 21:20:03.635:         xid: 100C, secs: 0, flags: 8000
*Jan 14 21:20:03.635:         client: 0.0.0.0, your: 192.168.1.6
*Jan 14 21:20:03.635:         srvr:   0.0.0.0, gw: 192.168.1.1
*Jan 14 21:20:03.635:         options block length: 60
*Jan 14 21:20:03.635: DHCP Ack Message
*Jan 14 21:20:03.639: DHCP: Lease Seconds: 86400    Renewal secs:  43200    Rebind secs:   75600
*Jan 14 21:20:03.639: DHCP: Server ID Option: 192.168.1.1
*Jan 14 21:20:06.659: DHCP: Releasing ipl options:
*Jan 14 21:20:06.659: DHCP: Applying DHCP options:
*Jan 14 21:20:06.659:   Setting default_gateway to 192.168.1.1
*Jan 14 21:20:06.663:   Adding default route 192.168.1.1
*Jan 14 21:20:06.719: Allocated IP address = 192.168.1.6  255.255.255.0
*Jan 14 21:20:06.719: %DHCP-6-ADDRESS_ASSIGN: Interface ATM1/0.1 assigned DHCP address 192.168.1.6, mask 255.255.255.0, hostname CPE1
*Jan 14 21:20:07.663: DHCP Client Pooling: ***Allocated IP address: 192.168.1.6

BrAS#
*Jan 14 21:20:01.447: DHCPD: relay binding created for client 01aa.aaaa.aaaa.aa.
*Jan 14 21:20:01.447: DHCPD: setting giaddr to 192.168.1.1.
*Jan 14 21:20:01.447: DHCPD: adding relay information option.
*Jan 14 21:20:01.447: DHCPD: relay information option content (add/replace):
*Jan 14 21:20:01.451:  DHCPD: 520e020c010100000000000010010029
*Jan 14 21:20:01.451: DHCPD: BOOTREQUEST from 01aa.aaaa.aaaa.aa forwarded to 150.0.0.50.
*Jan 14 21:20:03.479: DHCPD: forwarding BOOTREPLY to client aaaa.aaaa.aaaa.
*Jan 14 21:20:03.483: DHCPD: Setting giaddr to 192.168.1.1
*Jan 14 21:20:03.483: DHCPD: validating relay information option.
*Jan 14 21:20:03.483: DHCPD: relay information option removed
*Jan 14 21:20:03.483:  outbound IF index  = 4
*Jan 14 21:20:03.487:  outbound IF sub-index = 10
*Jan 14 21:20:03.487: DHCPD: Keeping state: Forwarding BOOTREPLY to client aaaa.aaaa.aaaa, on UNNUM-IF
*Jan 14 21:20:03.559: DHCPD: Finding a relay for client 01aa.aaaa.aaaa.aa on interface ATM1/0.10.
*Jan 14 21:20:03.559: DHCPD: setting giaddr to 192.168.1.1.
*Jan 14 21:20:03.559: DHCPD: adding relay information option.
*Jan 14 21:20:03.559: DHCPD: relay information option content (add/replace):
*Jan 14 21:20:03.559:  DHCPD: 520e020c010100000000000010010029
*Jan 14 21:20:03.563: DHCPD: BOOTREQUEST from 01aa.aaaa.aaaa.aa forwarded to 150.0.0.50.
*Jan 14 21:20:03.619: DHCPD: forwarding BOOTREPLY to client aaaa.aaaa.aaaa.
*Jan 14 21:20:03.619: DHCPD: Setting giaddr to 192.168.1.1
*Jan 14 21:20:03.623: DHCPD: validating relay information option.
*Jan 14 21:20:03.627: DHCPD: relay information option removed
*Jan 14 21:20:03.627:  outbound IF index  = 4
*Jan 14 21:20:03.627:  outbound IF sub-index = 10
*Jan 14 21:20:03.627: DHCPD: Keeping state: Forwarding BOOTREPLY to client aaaa.aaaa.aaaa, on UNNUM-IF

DHCPSrv-GW#

*Jan 14 21:20:01.439: DHCPD: DHCPDISCOVER received from client 01aa.aaaa.aaaa.aa through relay 192.168.1.1.

*Jan 14 21:20:01.443: DHCPD: Allocate an address without class information (192.168.1.0)

*Jan 14 21:20:03.443: DHCPD: Sending DHCPOFFER to client 01aa.aaaa.aaaa.aa (192.168.1.6).

*Jan 14 21:20:03.443: DHCPD: unicasting BOOTREPLY for client aaaa.aaaa.aaaa to relay 192.168.1.1.

*Jan 14 21:20:03.579: DHCPD: DHCPREQUEST received from client 01aa.aaaa.aaaa.aa.

*Jan 14 21:20:03.583: DHCPD: No default domain to append - abort update

*Jan 14 21:20:03.583: DHCPD: Sending DHCPACK to client 01aa.aaaa.aaaa.aa (192.168.1.6).

*Jan 14 21:20:03.583: DHCPD: unicasting BOOTREPLY for client aaaa.aaaa.aaaa to relay 192.168.1.1.

DHCPSrv-GW#

More:
http://blog.ine.com/2009/07/22/understanding-dhcp-option-82/
http://www.cisco.com/en/US/docs/ios/12_4t/ip_addr/configuration/guide/htdhcpre.html
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gdhcpopt.html
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtdhcprr.html
http://www.cisco.com/en/US/docs/ios/12_4t/ip_addr/configuration/guide/htdhcpre.html

[rbak-nsp] Internal icmp ratelimiting?

Show card X icmp  

PTA

lac:

hostname R1 

! 

no ip domain lookup 

! 

ip cef 

vpdn enable 

! 

vpdn-group pppoetest 

 accept-dialin 

  protocol pppoe 

  virtual-template 1 

! 

interface Loopback0 

 ip address 1.1.1.1 255.255.255.255 

! 

interface FastEthernet0/0 

 ip address 10.10.10.1 255.255.255.0 

 pppoe enable 

! 

interface Virtual-Template1 

 mtu 1492 

 ip unnumbered FastEthernet0/0 

 peer default ip address pool pppoepool 

! 

ip local pool pppoepool 10.10.10.2 10.10.10.100

client:

hostname R2 

! 

no ip domain lookup 

! 

ip cef 

! 

interface FastEthernet0/0 

 no ip address 

 pppoe enable 

 pppoe-client dial-pool-number 1 

! 

interface Dialer1 

 mtu 1492 

 ip address negotiated 

 encapsulation ppp 

 dialer pool 1 

 dialer-group 1 

 no peer neighbor-route 

! 

ip route 0.0.0.0 0.0.0.0 Dialer1 

! 

dialer-list 1 protocol ip permit

LAC - LNS - PPP, PPPoE, L2TP

LNS:

!

hostname LNS

!

vpdn enable

vpdn multihop

!

vpdn-group L2TP-LNS

 accept-dialin

  protocol l2tp

  virtual-template 1

 terminate-from hostname LAC

 local name LNS

 no l2tp tunnel authentication

 relay pppoe bba-group PPPoE

!

bba-group pppoe PPPoE

 virtual-template 1

!         

interface Loopback0

 ip address 10.0.0.3 255.255.255.255

!

interface Loopback999
 description for_tests

 ip address 1.1.1.1 255.255.255.255
!

interface FastEthernet1/0
 no ip address
 no shutdown

 duplex auto
 speed auto
 no keepalive
!

interface FastEthernet1/0.203
 encapsulation dot1q 203

 ip address 192.168.23.3 255.255.255.0

!

interface Virtual-Template1

 ip unnumbered Loopback0

 peer default ip address pool PPP_Pool
 keepalive 240

!

ip local pool PPP_Pool 210.1.1.1 210.1.1.254

ip route 10.0.0.2 255.255.255.255 192.168.23.2 name LNS-to-LAC

!
no cdp run
!

LAC:

hostname LAC

!

subscriber profile PPPoE_Profile

 service relay pppoe vpdn group L2TP-LAC

!

vpdn enable

vpdn source-ip 10.0.0.2

!

vpdn-group L2TP-LAC

 request-dialin

  protocol l2tp

  domain test.com

 initiate-to ip 10.0.0.3 

 local name LAC

 no l2tp tunnel authentication

 l2tp tunnel receive-window 1         

!

bba-group pppoe PPPoE

 virtual-template 1

 service profile PPPoE_Profile

!

!

interface Loopback0

 ip address 10.0.0.2 255.255.255.255

!
interface FastEthernet1/0
 no ip address
 no shutdown
 duplex auto
 speed auto
 no keepalive
!

interface FastEthernet1/0.102
 encapsulation dot1q 102

 no ip address

 pppoe enable group PPPoE

!

interface FastEthernet1/0.203
 encapsulation dot1q 203

 ip address 192.168.23.2 255.255.255.0

!

interface Virtual-Template1

 ip unnumbered Loopback0

!

ip route 10.0.0.3 255.255.255.255 192.168.23.3 name LAC-to-LNS

!
no cdp run
!

CPE:

!

hostname CPE

!

interface Loopback0

 ip address 123.123.123.123 255.255.255.255

!
interface FastEthernet1/0
 no ip address
 no shutdown

 duplex auto
 speed auto
 no keepalive
!

interface FastEthernet1/0.102

 encapsulation dot1q 102

 pppoe enable group global

 pppoe-client dial-pool-number 1

!         

interface Dialer1

 ip address negotiated

 encapsulation ppp

 dialer pool 1

 dialer idle-timeout 0

 dialer-group 1
 ppp ipcp route default

!

no cdp run

!

To take traces:

• no cdp run 
• no keepalive on interfaces
• change keepalive (240s) on interface Dialer 1 (CPE) and interface Virtual-Template (LNS).