The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [MPLS-OPS] tag-switching mtu command on cisco IOS
Title: CCIE Logo ΖνΑφΑφ Hi
Everyone~~
I have a question about cisco's
" tag-switching mtu" command.
Please let me know the good
answer and reason...
-----------------------------------------------------------------------------
(( Diagram
))
--[IP Network]----(e0/0)
"CISCO ROUTER" (e0/1)----[ MPLS Network ]----
(( Situation -1
))
(1) Configuration
- IP datagram mtu on e0/1 = 1500 Byte
(Default Configuration)
-
"tag-swtiching mtu 1504" on e0/1 interface.
(2) IP Packet Arrived from e0/0
-Size
: 1500-Byte
-DF Bit Set :
No
-Forwarding Interface : e0/1
-1 Label will be imposed.(4 byte
overhead)
Will the
Cisco router fragment this IP packet before sending it to e0/1?
or send 1504
Labeled packet without fragmentation. ( override IP mtu 1500
)
(( Situation -2
))
(1) Same Configuration, Same
Diagram to Situation-1
(2) IP Packet Arrived from
e0/0
-Size
: 1500-Byte
-DF Bit Set :
No
-Forwarding Interface : e0/1
-2 Label will be imposed.(8 byte overhead
..)
Will the Cisco router fragment this IP packet before
sending it to e0/1?
----------------------------------------------------------------------------- Thanks
Best
Regards.
================================================== Huisuk Hong
System Engineering
==================================================
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