and got the warning (see the EOM for the outputs) that the MTU is high (the default MTU for this interface is 4470. Is there a reason to change the MTU size in this case. We are running PPPeE on ATM for our ADSL custommers.
Thanks a lot,
sh int atm 1/0 output:
ATM1/0 is up, line protocol is up
Hardware is ENHANCED ATM PA
MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM, loopback not set
Keepalive not supported
4096 maximum active VCs, 188 current VCCs
VC idle disconnect time: 300 seconds
0 carrier transitions
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:08:35
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
MTU for ATM interface is defaults to 4470..(maximum mtu on that interface). You should not modify the mtu size at atm layer..At ip protocol later mtu should be 1492....
Changing the MTU value with the mtu interface configuration command can affect values for the protocol-specific versions of the command (ip mtu for example). If the value specified with the ip mtu interface configuration command is the same as the value specified with the mtu command and you change the value for the mtu command, the ip mtu value automatically matches the new mtu value. However, changing the value for the ip mtu command has no effect on the value for the mtu command.
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