Issues with agr interface?

To: netbsd-users%NetBSD.org@localhost
Subject: Issues with agr interface?
From: Havard Eidnes <he%NetBSD.org@localhost>
Date: Fri, 04 Apr 2014 17:25:29 +0200 (CEST)

Hi,

I just tried to use agr(4) for the first time on NetBSD, on a
host running NetBSD 1.6.3.  It's coupled to a pair of Juniper
stacked switches upstream.  Ifconfig on the host does not show
flags=<COLLECTING,DISTRIBUTING> for one of the interfaces:

agr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        
capabilities=3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CSUM_Rx,UDP4CSUM_Tx>
        enabled=0
        agrport: bnx1, flags=0x3<COLLECTING,DISTRIBUTING>
        agrport: bnx0, flags=0x0>
        address: 00:1a:64:94:71:ce
...

(the "address" of agr0 is the address of bnx1, bnx0's address
ends in "cc".)

The Juniper switch says:

xx-sw2> show lacp interfaces ae4             
Aggregated interface: ae4
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      ge-0/0/0       Actor    No    No    No   No   No   Yes     Fast    Active
      ge-0/0/0     Partner    No    No    No   No  Yes   Yes     Slow    Active
      ge-1/0/0       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      ge-1/0/0     Partner    No    No   Yes  Yes  Yes   Yes     Slow    Active
    LACP protocol:        Receive State  Transmit State          Mux State 
      ge-0/0/0                  Current   Slow periodic           Detached
      ge-1/0/0                  Current   Slow periodic Collecting distributing

{master:2}
xx-sw2> 

Any clues to why the second link doesn't want to go active?
Both agrport interfaces are of course operationally "up".

I see outgoing frames on bnx0 which look like this:

15:16:08.495432 00:1a:64:94:71:cc (oui Unknown) > 01:80:c2:00:00:02 (oui 
Unknown), ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
        Actor Information TLV (0x01), length 20
          System 00:1a:64:94:71:cc (oui Unknown), System Priority 32768, Key 
144, Port 1, Port Priority 32768
          State Flags [Activity, Aggregation, Synchronization]
          0x0000:  8000 001a 6494 71cc 0090 8000 0001 0d00
          0x0010:  0000
        Partner Information TLV (0x02), length 20
          System 4c:96:14:ea:d2:60 (oui Unknown), System Priority 127, Key 5, 
Port 9, Port Priority 127
          State Flags [Activity, Timeout, Aggregation]
          0x0000:  007f 4c96 14ea d260 0005 007f 0009 0700
          0x0010:  0000
        Collector Information TLV (0x03), length 16
          Max Delay 0
          0x0000:  0000 0000 0000 0000 0000 0000 0000
        Terminator TLV (0x00), length 0 (=52)
          0x0000:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0010:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0020:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0030:  0000

and incoming

17:20:42.207200 4c:96:14:ea:d2:67 (oui Unknown) > 01:80:c2:00:00:02 (oui 
Unknown), ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
        Actor Information TLV (0x01), length 20
          System 4c:96:14:ea:d2:60 (oui Unknown), System Priority 127, Key 5, 
Port 9, Port Priority 127
          State Flags [Activity, Timeout, Aggregation]
          0x0000:  007f 4c96 14ea d260 0005 007f 0009 0700
          0x0010:  0000
        Partner Information TLV (0x02), length 20
          System 00:1a:64:94:71:cc (oui Unknown), System Priority 32768, Key 
130, Port 1, Port Priority 32768
          State Flags [Activity, Aggregation, Synchronization, Collecting, 
Distributing]
          0x0000:  8000 001a 6494 71cc 0082 8000 0001 3d00
          0x0010:  0000
        Collector Information TLV (0x03), length 16
          Max Delay 0
          0x0000:  0000 0000 0000 0000 0000 0000 0000
        Terminator TLV (0x00), length 0 (=52)
          0x0000:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0010:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0020:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0030:  0000

On bnx1 I see outgoing:

17:15:39.410278 00:1a:64:94:71:ce (oui Unknown) > 01:80:c2:00:00:02 (oui Unknown
), ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
        Actor Information TLV (0x01), length 20
          System 00:1a:64:94:71:ce (oui Unknown), System Priority 32768, Key 144
, Port 2, Port Priority 32768
          State Flags [Activity, Aggregation, Synchronization, Collecting, Distr
ibuting]
          0x0000:  8000 001a 6494 71ce 0090 8000 0002 3d00
          0x0010:  0000
        Partner Information TLV (0x02), length 20
          System 4c:96:14:ea:d2:60 (oui Unknown), System Priority 127, Key 5, 
Port 10, Port Priority 127
          State Flags [Activity, Timeout, Aggregation, Synchronization, 
Collecting, Distributing]
          0x0000:  007f 4c96 14ea d260 0005 007f 000a 3f00
          0x0010:  0000
        Collector Information TLV (0x03), length 16
          Max Delay 0
          0x0000:  0000 0000 0000 0000 0000 0000 0000
        Terminator TLV (0x00), length 0 (=52)
          0x0000:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0010:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0020:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0030:  0000

and incoming

17:15:40.429185 4c:96:14:ea:d2:67 (oui Unknown) > 01:80:c2:00:00:02 (oui 
Unknown), ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
        Actor Information TLV (0x01), length 20
          System 4c:96:14:ea:d2:60 (oui Unknown), System Priority 127, Key 5, 
Port 10, Port Priority 127
          State Flags [Activity, Timeout, Aggregation, Synchronization, 
Collecting, Distributing]
          0x0000:  007f 4c96 14ea d260 0005 007f 000a 3f00
          0x0010:  0000
        Partner Information TLV (0x02), length 20
          System 00:1a:64:94:71:ce (oui Unknown), System Priority 32768, Key 
144, Port 2, Port Priority 32768
          State Flags [Activity, Aggregation, Synchronization, Collecting, 
Distributing]
          0x0000:  8000 001a 6494 71ce 0090 8000 0002 3d00
          0x0010:  0000
        Collector Information TLV (0x03), length 16
          Max Delay 0
          0x0000:  0000 0000 0000 0000 0000 0000 0000
        Terminator TLV (0x00), length 0 (=52)
          0x0000:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0010:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0020:  0000 0000 0000 0000 0000 0000 0000 0000
          0x0030:  0000

The output packet on bnx0 seems to have a different address
embedded than on bnx1 -- is that the problem?  The Juniper box
uses the same value in the two announcements it sends.

I know too little about the 802.3ad protocol to tell...

Regards,

- Håvard

Follow-Ups:
- Re: Issues with agr interface?
  - From: Thor Lancelot Simon

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