[j-nsp] VLAN tagging on fxp?

[Joe McGuckin]

So, you can afford a Juniper but you can't afford a 'real' switch? Even a
used 3548 is only about $1200.

Repeat after me: 

  "I will not use DLINK or NETGEAR products in my network"

Joe



On 9/8/05 12:40 PM, "Kristian Larsson" <kristian at juniks.net> wrote:

> 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
>>> 
>>> _______________________________________________
>>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>>> http://puck.nether.net/mailman/listinfo/juniper-nsp
>>> 
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/juniper-nsp
> 

-- 

Joe McGuckin

ViaNet Communications
994 San Antonio Road
Palo Alto, CA  94303

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