[j-nsp] Re: VLAN tagging

[Mark Delaney]

I think you'll find on a Cisco with the config below that packets sent
on f4/0 end up being tagged on VLAN 1.

-- 
Mark Delaney, Accent UK, Network Architecture Manager
mark.delaney at accentuk.com, Tel: +44 1296 300061 / 3061, Mob: +44 7971
264452
 

> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of 
> Daniel Roesen
> Sent: 18 January 2005 16:52
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] Re: VLAN tagging
> 
> On Tue, Jan 18, 2005 at 04:35:42PM +1300, Thomas Salmen wrote:
> > On a Cisco router, it is possible to do this:
> > 
> > interface FastEthernet4/0
> >  ip address 192.168.1.1 255.255.255.252 !
> > interface FastEthernet4/0.100
> > encapsulation dot1Q 100
> >  ip address 10.100.100.1 255.255.255.252 !
> > interface FastEthernet4/0.200
> > encapsulation dot1Q 200
> > ip address 10.200.200.1 255.255.255.252
> > 
> > That is, add VLAN-tagged logical subinterfaces to a non-tagged 
> > physical interface.
> > 
> > Does anyone know if this can be duplicated on an M-series?
> 
> No, impossible. An ethernet interface with enabled 
> vlan-tagging does tag each and every VLAN. You can't send 
> untagged frames with that.
> 
> You'll need to adapt your trunk to tag anything. JunOS has no 
> concept of "native" (untagged) VLAN.
> 
> 
> Best regards,
> Daniel
> 
> --
> CLUE-RIPE -- Jabber: dr at cluenet.de -- dr at IRCnet -- PGP: 
> 0xA85C8AA0 _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net 
> http://puck.nether.net/mailman/listinfo/juniper-nsp
>  
> 
> 

This electronic message contains information from AccentUK, which may be privileged or confidential. The information is intended for use only by the individual(s) or entity named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is strictly prohibited. If you have received this electronic message in error, please notify me by telephone or e-mail (to the number or e-mail address above) immediately. 

Activity and use of the AccentUK e-mail system is monitored to secure its effective operation and for other lawful business purposes. Communications using this system will also be monitored and may be recorded to secure effective operation and for other lawful business purposes. 
AccentUK Limited. Registered office: Accent House, Triangle Business Park, Bucks, HP22 5SX  Registered in England no: 4019639