Hi all,
Imagine the following VPN scenario:
CE----PE---P---P---PE----CE
I have FastEthernet in all the links, and tag-switching mtu 1508 at the PEs and Ps interfaces.
Due to the label stacking(2 labels) we have additional 8 bytes in the MTU size. So, at the CPE the maximum datagram size I can send is 1500 (What I did was pings with 1500 and with the DF=1).
My question is:
Why pings fail with datagram size of 1504 from PE to PE?
From what I understand there will be only one label (4 bytes) pushed in the packet, therefore the mtu size will be 1508...
Thanks in advance,
Imagine the following VPN scenario:
CE----PE---P---P---PE----CE
I have FastEthernet in all the links, and tag-switching mtu 1508 at the PEs and Ps interfaces.
Due to the label stacking(2 labels) we have additional 8 bytes in the MTU size. So, at the CPE the maximum datagram size I can send is 1500 (What I did was pings with 1500 and with the DF=1).
My question is:
Why pings fail with datagram size of 1504 from PE to PE?
From what I understand there will be only one label (4 bytes) pushed in the packet, therefore the mtu size will be 1508...
Thanks in advance,
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