[j-nsp] proxy arp C vs J

[biwa net]

Forgot to add we are running MX80 on Junos 11.2

On 6 February 2012 19:56, biwa net <biwa2go at gmail.com> wrote:

> Hi Guys
> We are experiencing some issues in one of our client sites,
>
> Basically we migrate from a Cisco to a Juniper MX80, and since there has
> been some issues,  mainly we are seeing IP addresses being shared by 2-3
> mac address, to be precise , mac address being rewritten , ie: one IP is
> being seen on the Juniper owned by 3 different mac address within one hour
> (  the 1st mac address is being re-writen by the 2nd one and then 2nd by
> the 3rd mac).
>
> This is causing a lot of users not having any kind of internet
> connectivity.When we rollback to the Cisco device , this issue does not
> occur.
>
> After investigation we can safely eliminates the DHCP server being the
> cause of issue (, also proved when Cisco is roll back in the topology),
>
> The config of the Cisco is fairly simple and is almost 99.99% than the one
> being copied over to the Juniper.
>
> One thing we notice is that both Cisco and Juniper has proxy-arp
> configured on some of the interface, and we are planning in our next
> maintenance to disable it.
>
> my question is: is the proxy-arp behavior in Juniper slightly different
> than the Cisco ?
>
> thanks for your inputs
>