From: roopa <roopa@cumulusnetworks•com>
To: Robert Shearman <rshearma@brocade•com>
Cc: netdev@vger•kernel.org,
"Eric W. Biederman" <ebiederm@xmission•com>,
Thomas Graf <tgraf@suug•ch>,
Vivek Venkatraman <vivek@cumulusnetworks•com>
Subject: Re: [RFC net-next 0/3] IP imposition of per-nh MPLS encap
Date: Tue, 02 Jun 2015 08:31:24 -0700 [thread overview]
Message-ID: <556DCC4C.7010808@cumulusnetworks.com> (raw)
In-Reply-To: <1433177175-16775-1-git-send-email-rshearma@brocade.com>
On 6/1/15, 9:46 AM, Robert Shearman wrote:
> In order to be able to function as a Label Edge Router in an MPLS
> network, it is necessary to be able to take IP packets and impose an
> MPLS encap and forward them out. The traditional approach of setting
> up an interface for each "tunnel" endpoint doesn't scale for the
> common MPLS use-cases where each IP route tends to be assigned a
> different label as encap.
>
> The solution suggested here for further discussion is to provide the
> facility to define encap data on a per-nexthop basis using a new
> netlink attribue, RTA_ENCAP, which would be opaque to the IPv4/IPv6
> forwarding code, but interpreted by the virtual interface assigned to
> the nexthop.
>
> A new ipmpls interface type is defined to show the use of this
> facility to allow IP packets to be imposed with an MPLS
> encap. However, the facility is designed to be general enough to be
> used by any encapsulation/tunneling mechanism that has similar
> requirements of high-scale, high-variation-of-encap.
>
> RFC because:
> - IPv6 side not implemented
> - struct rtable shouldn't be bloated by pointer+uint
> - Hasn't been thoroughly tested yet
>
> Robert Shearman (3):
> net: infra for per-nexthop encap data
> ipv4: storing and retrieval of per-nexthop encap
> mpls: new ipmpls device for encapsulating IP packets as mpls
>
>
Glad to see these patches!.
I have a similar series i have been working on...but no netdevice.
A set of ops similar to iptun_encaps and I store encap data in fib_nh
and in ip_route_output_slow i point the dst.output to the output func
provided by one of the encap ops.
I see the advantages of using a netdevice...and i see this align with
patches from thomas.
next prev parent reply other threads:[~2015-06-02 15:31 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-01 16:46 [RFC net-next 0/3] IP imposition of per-nh MPLS encap Robert Shearman
2015-06-01 16:46 ` [RFC net-next 1/3] net: infra for per-nexthop encap data Robert Shearman
2015-06-02 18:15 ` Eric W. Biederman
2015-06-01 16:46 ` [RFC net-next 2/3] ipv4: storing and retrieval of per-nexthop encap Robert Shearman
2015-06-02 16:01 ` roopa
2015-06-02 16:35 ` Robert Shearman
2015-06-01 16:46 ` [RFC net-next 3/3] mpls: new ipmpls device for encapsulating IP packets as mpls Robert Shearman
2015-06-02 16:15 ` roopa
2015-06-02 16:33 ` Robert Shearman
2015-06-02 18:57 ` roopa
2015-06-02 21:06 ` Robert Shearman
2015-06-03 18:43 ` Vivek Venkatraman
2015-06-04 18:46 ` Robert Shearman
2015-06-04 21:38 ` Vivek Venkatraman
2015-06-02 18:26 ` Eric W. Biederman
2015-06-02 21:37 ` Thomas Graf
2015-06-02 22:48 ` Eric W. Biederman
2015-06-02 23:23 ` Eric W. Biederman
2015-06-03 9:50 ` Thomas Graf
2015-06-02 0:06 ` [RFC net-next 0/3] IP imposition of per-nh MPLS encap Thomas Graf
2015-06-02 13:28 ` Robert Shearman
2015-06-02 21:43 ` Thomas Graf
2015-06-03 13:30 ` Robert Shearman
2015-06-02 15:31 ` roopa [this message]
2015-06-02 18:30 ` Eric W. Biederman
2015-06-02 18:39 ` roopa
2015-06-02 18:11 ` Eric W. Biederman
2015-06-02 20:57 ` Robert Shearman
2015-06-02 21:10 ` Eric W. Biederman
2015-06-02 22:15 ` Robert Shearman
2015-06-02 22:58 ` Eric W. Biederman
2015-06-04 15:12 ` Nicolas Dichtel
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