H5------S3-----H6

|

R1

/\

/    \

H1-------------S1       S2----------H4

  |            |

  |             |

  H2            H3
I want to implement this topology, R1 is the router connected to 3
switches, implement NAT between upper part of R1 and lower part. i had to
make MAC and port table on S1, S2 and S3. While on R1, i had to make IP to
MAC table, NAT table, subnet table. i cant handle ARP for switches and
routers. will u help me out?

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