On 12/26/24 8:24 AM, Saku Ytti wrote:
> On Thu, 26 Dec 2024 at 05:55, Bryan Fields <br...@bryanfields.net> wrote:
>
>> vlan {
>> unit 405 {
>> family iso {
>> # holy shit this is important. CISCO and Juniper will not talk unless
>> the
>> MTU is set
>> mtu 1492;
>> }
>> }
>> }
> This is almost certainly the wrong solution to a real problem. Real
> problem being, you have MTU mismatch, and the wrong solution is you
> solve it for one ifa. You almost certainly want the MTU to be fixed in
> ifl or maybe even ifd.
I believe it was that one side was vlan tagged and the other wasn't or
something to the effect of how the ISO MTU was calculated in the classic-IOS
version vs. Junos. As this was for less than a carrier grade setup (tactical
deployment during an hurricane) I didn't have time to get deep into it. A
3945e isn't exactly current anyway. I think the other juniper involved was a
4500, so kind of in the same age as the cisco.
--
Bryan Fields
727-409-1194 - Voice
http://bryanfields.net
