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Example: ppp over l2tp2

r1:

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hostname r1
buggy
!
logging file debug ../binTmp/zzz63r1-log.run
!
ipv4 pool p4 2.2.2.1 0.0.0.1 254
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 4.4.4.4 255.255.255.255
 no shutdown
 no log-link-change
 exit
!
interface dialer1
 no description
 encapsulation ppp
 ppp ip4cp open
 ppp ip4cp local 2.2.2.0
 vrf forwarding v1
 ipv4 address 2.2.2.0 255.255.255.255
 ipv4 pool p4
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.1 255.255.255.0
 ipv6 address 1234::1 ffff::
 no shutdown
 no log-link-change
 exit
!
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server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
server l2tp2 l2tp
 clone dialer1
 vrf v1
 exit
!
!
end

r2:

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hostname r2
buggy
!
logging file debug ../binTmp/zzz63r2-log.run
!
prefix-list p1
 sequence 10 permit 0.0.0.0/0 ge 0 le 0
 exit
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface dialer1
 no description
 encapsulation ppp
 ppp ip4cp open
 ppp ip4cp local 0.0.0.0
 vrf forwarding v1
 ipv4 address 3.3.3.3 255.255.255.128
 ipv4 gateway-prefix p1
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.0
 ipv6 address 1234::2 ffff::
 no shutdown
 no log-link-change
 exit
!
proxy-profile p1
 vrf v1
 exit
!
vpdn l2tp
 interface dialer1
 proxy p1
 target 1.1.1.1
 called 1234
 calling 4321
 direction incoming
 protocol l2tp2
 exit
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server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end

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r2#
r2#
r2#show inter dia1 full
r2#show inter dia1 full
dialer1 is up (since 00:00:00, 3 changes)
 description:
 type is dialer, hwaddr=none, mtu=1396, bw=8000kbps, vrf=v1
 ip4 address=2.2.2.79/25, netmask=255.255.255.128, ifcid=997611506
 received 10 packets (660 bytes) dropped 0 packets (0 bytes)
 transmitted 10 packets (660 bytes) promisc=false macsec=false sgt=false
 |~~~~~~~|~~~~|~~~~|~~~~~~|~~~~|~~~~|~~~~~~|
 |       | packet         | byte           |
 | time  | tx | rx | drop | tx | rx | drop |
 |-------|----|----|------|----|----|------|
 | 1sec  | 0  | 0  | 0    | 0  | 0  | 0    |
 | 1min  | 0  | 0  | 0    | 0  | 0  | 0    |
 | 1hour | 0  | 0  | 0    | 0  | 0  | 0    |
 |_______|____|____|______|____|____|______|
 |~~~~~~~~|~~~~~~~|~~~~~~~~~|~~~~|~~~~|~~~~~~|~~~~~|~~~~~|~~~~~~|
 |                          | packet         | byte             |
 | type   | value | handler | tx | rx | drop | tx  | rx  | drop |
 |--------|-------|---------|----|----|------|-----|-----|------|
 | ethtyp | 0000  | null    | 0  | 0  | 0    | 0   | 0   | 0    |
 | ethtyp | 0800  | ip4     | 10 | 10 | 0    | 660 | 660 | 0    |
 |________|_______|_________|____|____|______|_____|_____|______|
 |~~~~~|~~~~|~~~~|
 | who | tx | rx |
 |-----|----|----|
 |_____|____|____|
 |~~~~~~~|~~~~~~|~~~~~~|
 | proto | pack | byte |
 |-------|------|------|
 | 1     | 10   | 660  |
 |_______|______|______|
 |~~~~~~~~~~~~|~~~~|~~~~|~~~~~~|~~~~~|~~~~~|~~~~~~|
 |            | packet         | byte             |
 | size       | tx | rx | drop | tx  | rx  | drop |
 |------------|----|----|------|-----|-----|------|
 | 0-255      | 10 | 10 | 0    | 660 | 660 | 0    |
 | 256-511    | 0  | 0  | 0    | 0   | 0   | 0    |
 | 512-767    | 0  | 0  | 0    | 0   | 0   | 0    |
 | 768-1023   | 0  | 0  | 0    | 0   | 0   | 0    |
 | 1024-1279  | 0  | 0  | 0    | 0   | 0   | 0    |
 | 1280-1535  | 0  | 0  | 0    | 0   | 0   | 0    |
 | 1536-1791  | 0  | 0  | 0    | 0   | 0   | 0    |
 | 1792-65535 | 0  | 0  | 0    | 0   | 0   | 0    |
 |____________|____|____|______|_____|_____|______|
 |~~~~~~~|~~~~~|~~~~~|~~~~~~|~~~~~|~~~~~|~~~~~~|
 |       | packet           | byte             |
 | class | cos | exp | prec | cos | exp | prec |
 |-------|-----|-----|------|-----|-----|------|
 | 0     | 10  | 10  | 10   | 660 | 660 | 660  |
 | 1     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 2     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 3     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 4     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 5     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 6     | 0   | 0   | 0    | 0   | 0   | 0    |
 | 7     | 0   | 0   | 0    | 0   | 0   | 0    |
 |_______|_____|_____|______|_____|_____|______|
           1|
           0|
           0|
           0|
           0|
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           0|
           0|
           0|
         bps|0---------10--------20--------30--------40--------50-------- seconds
           1|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
         bps|0---------10--------20--------30--------40--------50-------- minutes
           1|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
           0|
         bps|0---------10--------20--------30--------40--------50-------- hours
r2#
r2#