Table: Port MTU Default and Maximum Values displays the default and maximum port MTU values that are dependent upon the port type, mode, and encapsulation type.
Port Type |
Mode |
Encap Type |
Default (bytes) |
Max MTU (bytes) |
|---|---|---|---|---|
|
10/100 Ethernet1 |
Access/ Network |
null |
1514 |
9724 2 |
dot1q |
1518 |
9728 2 |
||
qinq 3 |
1522 (access only) |
9732 (access only) 2 |
||
|
GigE SFP and 10-GigE SFP+ 1 |
Access/ Network |
null |
1514 (access) 1572 (network) |
9724 (access and network) |
dot1q |
1518 (access) 1572 (network) |
9728 (access and network) |
||
qinq 3 |
1522 (access only) |
9732 (access only) |
||
Ring port |
Network |
null |
9728 (fixed) |
9728 (fixed) |
v-port (on Ring adapter card) |
Network |
null |
1572 |
9724 |
dot1q |
1572 |
9728 |
||
TDM (PW) |
Access |
cem |
1514 |
1514 |
TDM (ATM PW) |
Access |
atm |
1524 |
1524 |
TDM (FR PW) |
Access |
frame-relay |
1514 |
2090 |
TDM (HDLC PW) |
Access |
hdlc |
1514 |
2090 |
TDM (IW PW) |
Access |
cisco-hdlc |
1514 |
2090 |
TDM (PPP/MLPPP) |
Access |
ipcp |
1502 |
2090 |
Network |
ppp-auto |
1572 |
2090 |
|
|
Serial V.35 or X.21 (FR PW) 4 |
Access |
frame-relay |
1514 |
2090 |
|
Serial V.35 or X.21 (HDLC PW) 4 |
Access |
hdlc |
1514 |
2090 |
|
Serial V.35 or X.21 (IW PW) 4 |
Access |
frame-relay |
1514 |
2090 |
ipcp |
1502 |
2090 |
||
cisco-hdlc |
1514 |
2090 |
||
SONET/SDH |
Access |
atm |
1524 |
1524 |
SONET/SDH |
Network |
ppp-auto |
1572 |
2090 |
For more information, refer to the ‟MTU Settings” section in the 7705 SAR Services Guide.