Loading IOS on Metro switches (e.g. ME-3400G-12CS-A)

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in order to load an IOS via TFTP on a cisco metro switch (in our case a ME-3400G-12CS-A) you have to define the port on which you connect the network cable as NNI:
‘port-type nni’
as the number of NNI ports is limited, you will probably have to define another port as an ENI pot type in order to have a free NNI port available:
‘port-type eni’
in our example we defined the first SFP port (interface GigabitEthernet0/13) as ENI in order to switch the port 12 (interface GigabitEthernet0/12), on which we connected to NNI.
below you find the procedure step by step:


Step 1:

Switch(config): interface GigabitEthernet0/13

Switch(config-if): port-type eni

Switch(config-if): exit

Switch(config): interface GigabitEthernet0/12

Switch(config-if): port-type nni

Switch(config-if): exit

Switch(config): interface Vlan1

Switch(config-if): ip address 10.0.01 255.255.255.0

Switch(config-if): no ip route-cache

Switch(config-if): end

Switch(config): interface gigabitEthernet 0/12

Switch(config-if): no shut


Step 2:

Switch#ping 10.0.01

Sending 5, 100-byte ICMP Echos to 10.0.02, timeout is 2 seconds: !!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/203/1007 ms


Step 3:

Switch#format flash:

Format operation may take a while. Continue? [confirm]

Format operation will destroy all data in "flash:". Continue? [confirm]

flashfs[1]: 0 files, 1 directories

flashfs[1]: 0 orphaned files, 0 orphaned directories

flashfs[1]: Total bytes: 32514048

flashfs[1]: Bytes used: 1024

flashfs[1]: Bytes available: 32513024

flashfs[1]: flashfs fsck took 8 seconds.

Format of flash complete


Step 4:

copy from tftp to flash

switch#copy tftp: flash: Address or name of remote host []? 10.0.01

Source filename []? me340x-metroipaccessk9-mz.122-55.SE.bin

Destination filename [me340x-metroipaccessk9-mz.122-55.SE.bin]?

Accessing tftp://10.0.01/me340x-metroipaccessk9-mz.122-55.SE.bin...

Loading me340x-metroipaccessk9-mz.122-55.SE.bin from 10.0.01 (via Vlan1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!! [OK - 12619566 bytes]

12619566 bytes copied in 171.447 secs (73606 bytes/sec)

Switch#


Step 5:

delete the config

Switch#wr erase

Erasing the nvram filesystem will remove all files! Continue? [confirm] hit enter [OK]

Erase of nvram: complete

Switch#


Step 6:

reload

Switch#reload

System configuration has been modified. Save? [yes/no]: no

Proceed with reload? [confirm] hit enter

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