From: David Ahern <dsa@cumulusnetworks•com>
To: roy.qing.li@gmail•com, netdev@vger•kernel.org
Subject: Re: question about vrf-lite
Date: Wed, 6 Jan 2016 09:18:04 -0700 [thread overview]
Message-ID: <568D3E3C.2030301@cumulusnetworks.com> (raw)
In-Reply-To: <1452074022-11816-1-git-send-email-roy.qing.li@gmail.com>
On 1/6/16 2:53 AM, roy.qing.li@gmail•com wrote:
> Hi David Ahern:
>
> when I test vrf-lite, I meet a question, could you help me?
>
> the envirnment is below:
> N2
> N1 (all configs here) +---------------+
> +--------------+ | |
> | | | |
> |eth0 :10.0.2.1+----------------------+eth0 :10.0.2.2 |
> | | +---------------+
> | VRF 1 |
> | table 5 |
> | |
> +---------------+
> | |
> | VRF 2 | N3
> | table 6 | +---------------+
> | | | |
> |eth1 :10.0.2.1+----------------------+eth0 :10.0.2.2 |
> +--------------+ +---------------+
>
> and configuration on N1 is below:
>
> ip link add vrf1 type vrf table 5
> ip link add vrf2 type vrf table 6
> ip rule add pref 200 oif vrf1 lookup 5
> ip rule add pref 200 iif vrf1 lookup 5
> ip rule add pref 200 oif vrf2 lookup 6
> ip rule add pref 200 iif vrf2 lookup 6
> ip link set vrf1 up
> ip link set vrf2 up
> ip link set eth0 master vrf1
> ip link set eth1 master vrf2
>
> the route information is below:
>
> # ip route get 10.0.2.2 oif vrf1
> 10.0.2.2 dev eth0 table 5 src 10.0.2.1
> cache
> #
> # ip route get 10.0.2.2 oif vrf2
> 10.0.2.2 dev eth1 table 6 src 10.0.2.1
> cache
> #
> #uname -r
> 4.4.0-rc5
> #
>
> when run the ping with different interfaces on N1, I expect
> "ping -I vrf1 10.0.2.2" send to/receive from packets with N2,
> "ping -I vrf2 10.0.2.2" send to/receive from packets with N3,
>
> but I found whether the interface is vrf1 or vrf2, the packets always
> is sent out through eth0, N2 reply; and no packets sent out through
> eth1.
>
> is it right?
no. The above works fine for me. I literally copied and pasted all of
the commands except the master ones which were adapted to my setup --
eth9 and eth11 for me instead of eth0 and eth1. tcpdump on N2, N3 show
the right one is receiving packets based on which 'ping -I vrf<N>' is run.
Do tables 5 and 6 have the right routes?
next prev parent reply other threads:[~2016-01-06 16:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-06 9:53 question about vrf-lite roy.qing.li
2016-01-06 16:18 ` David Ahern [this message]
2016-01-07 1:04 ` Li RongQing
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