[j-nsp] VLAN tagging on fxp?

[Kristian Larsson]

On Thu, Sep 08, 2005 at 03:22:00PM -0400, Matt Yaklin wrote:
> 
> 
> On Thu, 8 Sep 2005, Kristian Larsson wrote:
> 
> > I'm in an environment where I need to tag the
> > traffic to a junipers out-of-band management port.
> 
> Couldn't you just create your switch port as an access port?
> As in the fxp0 does not need to be vlan aware. When it sends
> out a packet, your switch tags it. When the packet comes
> back it strips the tag.
No, unfortunately I cannot.
The switch only supports either "tagged mode" or
"port based vlans". Tagged mode configures every
port on the switch as a trunk while port based
doesn't support trunk ports but only segmentation
of the switch. And no, there is no native vlan and
no I cannot set a port to being a simple 
switchport. The switch is basically braindead and 
for the time being I'm stuck with it.
Right now I think the Juniper is just as braindead
as I should be able to set MTU on my mgmt 
interface, right?

//Kristian
> Same result?
> 
> i hope this helps,
> good luck
> 
> m
> 
> > After configuring the port I ran into some problems..
> > ssh went just fine but when trying to upload/download
> > new firmware it just stopped. Debugging turned out that
> > subinterfaces to the fxp0 interface have a MTU of 1496.
> >
> > Is it possible to change this?
> > mtu does not seem to be an option on the fxp interface!?
> > I tried setting it manually with ifconfig but to no avail
> >
> > Juniper: feature request!?
> >
> > //Kristian
> >
> >     fxp0 {
> >         vlan-tagging;
> >         unit 10 {
> >             vlan-id 10;
> >             family inet {
> >                 address xx.xx.xx.xx/24;
> >             }
> >
> >  Logical interface fxp0.10 (Index 67) (SNMP ifIndex 25)
> >     Flags: SNMP-Traps VLAN-Tag [ 0x8100.10 ]  Encapsulation: ENET2
> >     Bandwidth: 10mbps
> >     Input packets : 2295
> >     Output packets: 2575
> >     Protocol inet, MTU: 1496
> >
> > _______________________________________________
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> >