netdev - Having trouble with VRF and ping link local ipv6 address.

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Message-ID: <6f0c873e-8062-4148-74c2-50f47c75565f@candelatech.com>
Date: Sun, 21 Jan 2024 16:29:50 -0800
From: Ben Greear <greearb@...delatech.com>
To: netdev <netdev@...r.kernel.org>
Cc: David Ahern <dsahern@...il.com>
Subject: Having trouble with VRF and ping link local ipv6 address.

Hello,

I am trying to test pinging link-local IPv6 addresses across a VETH pair, with each VETH
in a VRF, but having no good luck.

Anyone see what I might be doing wrong?


[root@ ]# ip -6 addr show dev rddVR5
161: rddVR5@...VR4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master _vrf15 state UP group default qlen 1000
     inet6 fe80::8088:c8ff:fe31:16ea/64 scope link
        valid_lft forever preferred_lft forever

[root@ ]# ip -6 addr show dev rddVR4
160: rddVR4@...VR5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master _vrf14 state UP group default qlen 1000
     inet6 fe80::d064:9eff:fead:2156/64 scope link
        valid_lft forever preferred_lft forever

[root@ ]# ip -6 route show table 15
anycast fe80:: dev rddVR5 proto kernel metric 1024 pref medium
local fe80::8088:c8ff:fe31:16ea dev rddVR5 proto kernel metric 0 pref medium
fe80::/64 dev rddVR5 proto kernel metric 256 pref medium
fe80::/64 dev rddVR5 metric 1024 pref medium
ff00::/8 dev rddVR5 metric 256 pref medium

[root@ ]# ip -6 route show table 14
local fe80::d064:9eff:fead:2156 dev rddVR4 proto kernel metric 0 pref medium
fe80::/64 dev rddVR4 proto kernel metric 256 pref medium
multicast ff00::/8 dev rddVR4 proto kernel metric 256 pref medium

[root@ ]# ip vrf exec _vrf15 ping -6 fe80::d064:9eff:fead:2156
PING fe80::d064:9eff:fead:2156(fe80::d064:9eff:fead:2156) 56 data bytes
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
^C


Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com