To all, I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors). I have 2 ASR's. Will EoMPLS work or is there another option? Philip
l2tpv3 Regards, Jeff On Sep 12, 2012, at 19:23, "Philip Lavine" <source_route@yahoo.com> wrote:
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
hello philip, for ethernet over mpls you can use gre tunnel and run mpls over that tunnel or you can go directly for l2tpv3 which give you the ability to run l2vpn over l3 ip routing with no need for mpls. BR, Mohamed Abosree On 9/13/12, Philip Lavine <source_route@yahoo.com> wrote:
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
-- Live As If You Were To Die Tomorrow. Learn As If You Were To Live Forever.
Mikrotik supports a proprietary format called an EOIP (ethernet over IP) tunnel. Justin -- Justin Wilson <j2sw@mtin.net> Aol & Yahoo IM: j2sw http://www.mtin.net/blog xISP News http://www.twitter.com/j2sw Follow me on Twitter http://www.thebrotherswisp.com -----Original Message----- From: mohamed Osama Saad Abo sree <mohamed.abosree@gmail.com> Date: Wednesday, September 12, 2012 6:33 PM To: Philip Lavine <source_route@yahoo.com> Cc: NANOG list <nanog@nanog.org> Subject: Re: Layer2 over Layer3
hello philip, for ethernet over mpls you can use gre tunnel and run mpls over that tunnel or you can go directly for l2tpv3 which give you the ability to run l2vpn over l3 ip routing with no need for mpls.
BR, Mohamed Abosree
On 9/13/12, Philip Lavine <source_route@yahoo.com> wrote:
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
-- Live As If You Were To Die Tomorrow. Learn As If You Were To Live Forever.
ASR supports OTV if you can do multicast over L3. Although, you may not need L2 extensions in the end. -----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Wednesday, September 12, 2012 6:23 PM To: NANOG list Subject: Layer2 over Layer3 To all, I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors). I have 2 ASR's. Will EoMPLS work or is there another option? Philip
Hey Philip, Any Transport over MPLS will do this too. Here's a link to an example setup of two sites where just L3 connectivity exists between them: https://w.ntwk.cc/working-on-atompls/. In that setup, I have just IPSEC VPN connecting the two locations, but have an 802.1q trunk extended between both. In the example configs, Fa0/1 on both ends is a transparent L2 connection. The boxes used here were 3725s on 12.4T. David. On Wed, Sep 12, 2012 at 3:37 PM, Paul Vinciguerra <pvinci@vinciconsulting.com> wrote:
ASR supports OTV if you can do multicast over L3. Although, you may not need L2 extensions in the end.
-----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Wednesday, September 12, 2012 6:23 PM To: NANOG list Subject: Layer2 over Layer3
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
If the psuedowire is setup to allow a vlan to be exteneded, but the vlan is already extended over a dedicated link, how will spanning tree behave? Right now I have it setup and I dont see the psuedowire trunk in a blocking state. Will the switch that has both the pseudowire trunk on it and the dedicated link know how to forward the frames if either goes away? ________________________________ From: David Swafford <david@davidswafford.com> To: Paul Vinciguerra <pvinci@vinciconsulting.com> Cc: Philip Lavine <source_route@yahoo.com>; NANOG list <nanog@nanog.org> Sent: Wednesday, September 12, 2012 7:46 PM Subject: Re: Layer2 over Layer3 Hey Philip, Any Transport over MPLS will do this too. Here's a link to an example setup of two sites where just L3 connectivity exists between them: https://w.ntwk.cc/working-on-atompls/. In that setup, I have just IPSEC VPN connecting the two locations, but have an 802.1q trunk extended between both. In the example configs, Fa0/1 on both ends is a transparent L2 connection. The boxes used here were 3725s on 12.4T. David. On Wed, Sep 12, 2012 at 3:37 PM, Paul Vinciguerra <pvinci@vinciconsulting.com> wrote:
ASR supports OTV if you can do multicast over L3. Although, you may not need L2 extensions in the end.
-----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Wednesday, September 12, 2012 6:23 PM To: NANOG list Subject: Layer2 over Layer3
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
If the psuedowire is setup to allow a vlan to be exteneded, but the vlan is already extended over a dedicated link, how will spanning tree behave? Right now I have it setup and I dont see the psuedowire trunk in a blocking state. Will the switch that has both the pseudowire trunk on it and the dedicated link know how to forward the frames if either goes away? ________________________________ From: David Swafford <david@davidswafford.com> To: Paul Vinciguerra <pvinci@vinciconsulting.com> Cc: Philip Lavine <source_route@yahoo.com>; NANOG list <nanog@nanog.org> Sent: Wednesday, September 12, 2012 7:46 PM Subject: Re: Layer2 over Layer3 Hey Philip, Any Transport over MPLS will do this too. Here's a link to an example setup of two sites where just L3 connectivity exists between them: https://w.ntwk.cc/working-on-atompls/. In that setup, I have just IPSEC VPN connecting the two locations, but have an 802.1q trunk extended between both. In the example configs, Fa0/1 on both ends is a transparent L2 connection. The boxes used here were 3725s on 12.4T. David. On Wed, Sep 12, 2012 at 3:37 PM, Paul Vinciguerra <pvinci@vinciconsulting.com> wrote:
ASR supports OTV if you can do multicast over L3. Although, you may not need L2 extensions in the end.
-----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Wednesday, September 12, 2012 6:23 PM To: NANOG list Subject: Layer2 over Layer3
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
Philip, Here is the best reference I know of to address your issue. http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/white_paper... From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Friday, September 14, 2012 6:06 PM To: David Swafford; Paul Vinciguerra Cc: NANOG list Subject: Re: Layer2 over Layer3 If the psuedowire is setup to allow a vlan to be exteneded, but the vlan is already extended over a dedicated link, how will spanning tree behave? Right now I have it setup and I dont see the psuedowire trunk in a blocking state. Will the switch that has both the pseudowire trunk on it and the dedicated link know how to forward the frames if either goes away? From: David Swafford <david@davidswafford.com<mailto:david@davidswafford.com>> To: Paul Vinciguerra <pvinci@vinciconsulting.com<mailto:pvinci@vinciconsulting.com>> Cc: Philip Lavine <source_route@yahoo.com<mailto:source_route@yahoo.com>>; NANOG list <nanog@nanog.org<mailto:nanog@nanog.org>> Sent: Wednesday, September 12, 2012 7:46 PM Subject: Re: Layer2 over Layer3 Hey Philip, Any Transport over MPLS will do this too. Here's a link to an example setup of two sites where just L3 connectivity exists between them: https://w.ntwk.cc/working-on-atompls/. In that setup, I have just IPSEC VPN connecting the two locations, but have an 802.1q trunk extended between both. In the example configs, Fa0/1 on both ends is a transparent L2 connection. The boxes used here were 3725s on 12.4T. David. On Wed, Sep 12, 2012 at 3:37 PM, Paul Vinciguerra <pvinci@vinciconsulting.com<mailto:pvinci@vinciconsulting.com>> wrote:
ASR supports OTV if you can do multicast over L3. Although, you may not need L2 extensions in the end.
-----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com<mailto:source_route@yahoo.com>] Sent: Wednesday, September 12, 2012 6:23 PM To: NANOG list Subject: Layer2 over Layer3
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
There are lots of options but beware of the MTU. -----Original Message----- From: Philip Lavine [mailto:source_route@yahoo.com] Sent: Wednesday, September 12, 2012 5:23 PM To: NANOG list Subject: Layer2 over Layer3 To all, I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors). I have 2 ASR's. Will EoMPLS work or is there another option? Philip
On 12 September 2012 23:23, Philip Lavine <source_route@yahoo.com> wrote:
To all,
I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors).
I have 2 ASR's. Will EoMPLS work or is there another option?
Philip
Depending on your specific requirements, if you simply want to be able to address hosts out of the same subnet and don't need actual layer 2 connectivity you might also want to consider proxy ARP(+NDP). This trades some issues for others, for example you don't need to worry about MTU issues, but it won't forward broadcast packets (this could be either an advantage or disadvantage) or non-IP packets, it also requires you to configure the routers so they know which addresses are at the other site. Lots of disadvantages but there are situations where it might be an option. - Mike
+1 on the l2tpv3 but watch out for your mtu's Carlos Alcantar Race Communications / Race Team Member 1325 Howard Ave. #604, Burlingame, CA. 94010 Phone: +1 415 376 3314 / carlos(@)race.com / http://www.race.com -----Original Message----- From: Philip Lavine <source_route@yahoo.com> Reply-To: Philip Lavine <source_route@yahoo.com> Date: Wednesday, September 12, 2012 3:23 PM To: "nanog@nanog.org" <nanog@nanog.org> Subject: Layer2 over Layer3 To all, I am trying to extend a layer2 connection over Layer 3 so I can have redundant Layer connectivity between my HQ and colo site. The reason I need this is so I can give the "appeareance" that there is one gateway and that both data centers can share the same Layer3 subnet (which I am announcing via BGP to 2 different vendors). I have 2 ASR's. Will EoMPLS work or is there another option? Philip
participants (9)
-
Carlos Alcantar -
David Swafford -
Jeff Tantsura -
Justin Wilson -
Matt Newsom -
Mike Jones -
mohamed Osama Saad Abo sree -
Paul Vinciguerra -
Philip Lavine