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Date:   Thu, 8 Oct 2020 20:39:25 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     netdev@...r.kernel.org
Subject: Fw: [Bug 209579] New: MPLS not forwarding packet, if packet type is
 not ipv4, ipv6



Begin forwarded message:

Date: Thu, 08 Oct 2020 07:33:23 +0000
From: bugzilla-daemon@...zilla.kernel.org
To: stephen@...workplumber.org
Subject: [Bug 209579] New: MPLS not forwarding packet, if packet type is not ipv4, ipv6


https://bugzilla.kernel.org/show_bug.cgi?id=209579

            Bug ID: 209579
           Summary: MPLS not forwarding packet, if packet type is not
                    ipv4, ipv6
           Product: Networking
           Version: 2.5
    Kernel Version: 5.4.24-rt15-2-rt
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: stephen@...workplumber.org
          Reporter: ne-vlezay80@...dex.ru
        Regression: No

The mpls packet is with label 100 not forwarding to gt0 interface.

Earlier soch the packet is normal forwarding.

```
#> tc filter show dev ns-test.0 parent ffff:  
filter protocol ipv6 pref 10 flower chain 0 
filter protocol ipv6 pref 10 flower chain 0 handle 0x1 
  dst_mac 33:33:ff:ff:ff:ff/33:33:00:00:00:00
  eth_type ipv6
  not_in_hw
        action order 1:  pedit action pipe keys 2
         index 1 ref 1 bind 1
         key #0  at eth+0: val 22222222 mask 00000000
         key #1  at eth+4: val 22220000 mask 0000ffff

        action order 2: mpls  push protocol mpls_uc label 100 ttl 255 pipe
         index 1 ref 1 bind 1

        action order 3: mirred (Egress Mirror to device lo) pipe
        index 1 ref 1 bind 1

filter protocol arp pref 49152 matchall chain 0 
filter protocol arp pref 49152 matchall chain 0 handle 0x1 
  not_in_hw
        action order 1:  pedit action pipe keys 2
         index 2 ref 1 bind 1
         key #0  at eth+0: val 22222222 mask 00000000
         key #1  at eth+4: val 22220000 mask 0000ffff

        action order 2: mpls  push protocol mpls_uc label 100 ttl 255 pipe
         index 3 ref 1 bind 1

[root@...h user (0)]
#> ip -M r  
100 as to 101 via inet 169.254.1.2 dev gt0 
105 dev ns-test.0 
[root@...h user (0)]
```

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