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Cisco ASR 9010 not fragmented Packages Superior size 1510

Hello,

my Cisco ASR 9010 not fragmented Packages Superior size 1510 (sorry for my english)

This is my sub-interface on Cisco PE:

Tue Dec 13 17:03:25.872 MET
interface GigabitEthernet0/1/0/14.1815
service-policy output S3480k_HI512k_MID1-10_MID2-20_MID3-10_BE10
vrf usi
ipv4 mtu 1500
ipv4 address 172.31.16.102 255.255.255.252
encapsulation dot1q 3 second-dot1q 1815

----------------------------------------------------------------

this is my sub-interface on Router;

interface Ethernet0/0/0.100
encapsulation dot1Q 100
ip address 172.31.16.101 255.255.255.252
ip pim sparse-mode
end

--------------------------------------------------------------

ping:

R23#ping 172.31.16.102 size 1510 repeat 1500
Type escape sequence to abort.
Sending 1500, 1510-byte ICMP Echos to 172.31.16.102, timeout is 2 seconds:
.!..!.!!.!.!..!!!!!!!!!!.!..!..!.!.!!!!.
Success rate is 60 percent (24/40), round-trip min/avg/max = 8/10/20 ms

Thanks you for your support 

1 Reply 1

Hello,

not sure if I understand what you are asking: the maximum MTU size for Ethernet is 1500. If you use ICMP packets with a size of 1510, they will be fragmented and hence you might lose some in the process.

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