Are you trying to transit 1500 or terminate 1500? You should be able to
pass and fragment. But maybe the mgmt plane won't frag if your trying the
interface itself.
hi, all:
i have a genetic question regarding ip fragmentation. i have two routers;
one is cisco and another is juniper. they
hi, all:
i have a genetic question regarding ip fragmentation. i have two routers; one
is cisco and another is juniper. they connected back to back with default
ethernet mtu (cisco 1522 and juniper 1518, of course with vlan on both ends). i
understand that two vendors have different ways of
you're correct that they calculate sizes differently. Cisco uses the
payload size including headers; Juniper just the data-payload size, so
for example a 9000 byte layer3 packet for Cisco = 9000 - 20B IP header -
8B ICMP header=8972B for Juniper.
you can get them to send unfragmented ICMP packets
thanks.
it is not about setting df bits. i didn't set df bits when i sent extended icmp
pings between two routers and i wasn't interested in that.
there are a few posts clearly explained the differences between two vendors in
terms of mtu calculations. that is not the point here.
what i am
I believe it does show 'the expected ip fragmentation'. this is from a
cisco 2921:
tpr-oob#show ip traffic | in frag
0 fragmented, 0 fragments, 0 couldn't fragment
tpr-oob#ping somehost size 1600
Type escape sequence to abort.
Sending 5, 1600-byte ICMP Echos to somehost, timeout is 2
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