Example: fragmentation and reassembly

TopologyConfigurationsVerificationEmulation

r1

hostname r1
vrf def v1
 rd 1:1
 exit
int ser1
 mtu 1500
 enforce-mtu both
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.0
 ipv6 addr 1234::1 ffff::
 ipv4 reassembly 16
 ipv4 fragmentation 1400
 ipv6 reassembly 16
 ipv6 fragmentation 1400
 exit

r2

hostname r2
vrf def v1
 rd 1:1
 exit
int ser1
 mtu 1500
 enforce-mtu both
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.0
 ipv6 addr 1234::2 ffff::
 ipv4 reassembly 16
 ipv4 fragmentation 1400
 ipv6 reassembly 16
 ipv6 fragmentation 1400
 exit

r1 tping 100 15 1.1.1.2 vrf v1 siz 222
r2 tping 100 15 1.1.1.1 vrf v1 siz 222
r1 tping 100 15 1234::2 vrf v1 siz 222
r2 tping 100 15 1234::1 vrf v1 siz 222
r1 tping 100 15 1.1.1.2 vrf v1 siz 2222
r2 tping 100 15 1.1.1.1 vrf v1 siz 2222
r1 tping 100 15 1234::2 vrf v1 siz 2222
r2 tping 100 15 1234::1 vrf v1 siz 2222
r1 tping -100 5 1.1.1.2 vrf v1 siz 2222 dont error
r2 tping -100 5 1.1.1.1 vrf v1 siz 2222 dont error
r1 tping -100 5 1234::2 vrf v1 siz 2222 dont error
r2 tping -100 5 1234::1 vrf v1 siz 2222 dont error

ContainerLabfreeRtr CLI

1. Install ContainerLab as described here
2. Fetch conn-frag01 file
3. Launch ContainerLab conn-frag01.yml topology:

   containerlab deploy --topo conn-frag01.yml  

4. Destroy ContainerLab conn-frag01.yml topology:

   containerlab destroy --topo conn-frag01.yml  

5. Copy-paste configuration for each node in the lab topology

1. Fetch or compile freeRtr rtr.jar file.
   You can grab it here
2. Fetch conn-frag01.tst file here
3. Launch conn-frag01.tst test:

   java -jar ../../rtr.jar test tester conn-frag01 path ./ temp ./ wait

4. Destroy freeRtr conn-frag01.tst test:

   Ctrl-C (In freeRtr test window)