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Forwarding failure in mesh interface

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piontec
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Posts: 8
Joined: Tue May 13, 2008 1:07 pm

Forwarding failure in mesh interface

Thu Apr 12, 2012 5:09 pm

Hello,

I just spent 3 hours trying to find out why wireless wds mesh behaves strange and does not work for some hosts. If someone can give me an explanation and show errors in configuration, I will be really greatful.

The setup is quite simple (ROS 5.14 everywhere on MTs):
[laptop-10.20.40.101/24] -- ethernet -- [mt 411U as Wds slave] -- wireless mesh -- [mt 433 uah-10.20.40.5/24]

MT411 is called "B" and MT433 "M"
When I try to ping M on 10.20.40.5 from laptop, ARP does not receive ARP response. I see ARP response leaving M, but it never reaches Laptop. My configuration is as below, I also include some logs from the sniffer:

Sniffer on B
Code: Select all
[admin@B] > /tool sniffer quick mac-protocol=arp interface=mlabs_bbone_mesh 
INTERFACE     TIME    NUM DI SRC-MAC           DST-MAC           VLAN   SRC-ADDRESS                        
mlabs_...    6.165      1 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mlabs_...    7.165      2 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mlabs_...    8.165      3 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mlabs_...    9.181      4 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mlabs_...   10.181      5 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mlabs_...   11.181      6 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?
Sniffer on M
Code: Select all
[admin@M] > /tool sniffer quick mac-protocol=arp interface=mesh-mlabs_bbone 
INTERFACE     TIME    NUM DI SRC-MAC           DST-MAC           VLAN   SRC-ADDRESS                        
mesh-m...    3.003      1 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    3.003      2 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55   
mesh-m...    4.003      3 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    4.003      4 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55   
mesh-m...    5.003      5 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    5.003      6 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55   
mesh-m...    6.019      7 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    6.019      8 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55   
mesh-m...    7.019      9 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    7.019     10 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55   
mesh-m...    8.019     11 <- 00:16:D3:B1:ED:94 FF:FF:FF:FF:FF:FF        10.20.40.101: who has 10.20.40.5?  
mesh-m...    8.019     12 -> 02:9E:5D:BF:EF:55 00:16:D3:B1:ED:94        10.20.40.5: at 02:9E:5D:BF:EF:55

config on B
Code: Select all
[admin@B] > /interface wireless print 
Flags: X - disabled, R - running 
 0  R name="wlan_b_08-5" mtu=1500 mac-address=00:0C:42:62:D3:37 arp=enabled interface-type=Atheros 11N 
      mode=wds-slave ssid="mlabsb" frequency=5180 band=5ghz-a/n channel-width=20mhz scan-list=default 
      wireless-protocol=unspecified wds-mode=dynamic-mesh wds-default-bridge=mlabs_bbone_mesh 
      wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes 
      default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=mlabsb compression=no 
[admin@B] > /interface wireless wds print 
Flags: X - disabled, R - running, D - dynamic 
 0  RD name="wds1" mtu=1500 l2mtu=2290 mac-address=00:0C:42:62:D3:37 arp=enabled 
       master-interface=wlan_b_08-5 wds-address=00:0C:42:62:CA:D7 

 1  RD name="wds2" mtu=1500 l2mtu=2290 mac-address=00:0C:42:62:D3:37 arp=enabled 
       master-interface=wlan_b_08-5 wds-address=00:0C:42:65:07:9E 
[admin@B] > /interface mesh print 
Flags: X - disabled, R - running 
 0  R name="mlabs_bbone_mesh" mtu=1500 arp=enabled mac-address=00:0C:42:62:D3:37 auto-mac=yes 
      admin-mac=00:00:00:00:00:00 mesh-portal=no hwmp-default-hoplimit=32 hwmp-preq-waiting-time=4s 
      hwmp-preq-retries=2 hwmp-preq-destination-only=yes hwmp-preq-reply-and-forward=yes 
      hwmp-prep-lifetime=5m hwmp-rann-interval=10s hwmp-rann-propagation-delay=0.5 hwmp-rann-lifetime=22s 
      reoptimize-paths=no 
[admin@B] > /interface mesh port print 
Flags: X - disabled, I - inactive, D - dynamic 
 #    INTERFACE                                              MESH                                             
 0    wlan_b_08-5                                            mlabs_bbone_mesh                                 
 1    ether1                                                 mlabs_bbone_mesh                                 
 2  D wds1                                                   mlabs_bbone_mesh                                 
 3  D wds2                                                   mlabs_bbone_mesh                                 
[admin@B] > /interface mesh fdb print     
Flags: A - active, R - root 
   MESH                    TYPE     MAC-ADDRESS       ON-INTERFACE                   LIFETIME     AGE         
A  mlabs_bbone_mesh        local    00:0C:42:4D:1B:81                                             16m7s       
A  mlabs_bbone_mesh        neighbor 00:0C:42:62:CA:D7 wds1                                        16m8s       
A  mlabs_bbone_mesh        local    00:0C:42:62:D3:37                                             16m8s       
A  mlabs_bbone_mesh        neighbor 00:0C:42:65:07:9E wds2                                        16m8s       
   mlabs_bbone_mesh        larval   00:12:13:14:15:16                                4m39s        15m51s      
A  mlabs_bbone_mesh        outsider 00:16:D3:B1:ED:94 ether1                         5m           16m7s       
   mlabs_bbone_mesh        larval   02:08:F6:10:4F:C8                                4m5s         15m55s      
AR mlabs_bbone_mesh        mesh     02:96:E5:E3:3C:6E wds2                           21s          1s          
   mlabs_bbone_mesh        larval   02:9E:5D:BF:EF:55                                4m38s        15m22s
config on M
Code: Select all
[admin@M] > /interface wireless print 
Flags: X - disabled, R - running 
 0  R name="wlan_r52hn_panel" mtu=1500 mac-address=00:0C:42:62:CA:D7 arp=enabled interface-type=Atheros 11N 
      mode=ap-bridge ssid="mlabsb" frequency=5180 band=5ghz-a/n channel-width=20mhz scan-list=default 
      wireless-protocol=unspecified wds-mode=dynamic-mesh wds-default-bridge=mesh-mlabs_bbone 
      wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes 
      default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=mlabsb compression=no 

 1    name="wlan_ar5413-2.4G-a8" mtu=1500 mac-address=00:15:6D:67:60:20 arp=enabled 
      interface-type=Atheros AR5413 mode=ap-bridge ssid="secpl-baki" frequency=2422 band=2ghz-b/g 
      channel-width=20mhz scan-list=default wireless-protocol=any antenna-mode=ant-a wds-mode=disabled 
      wds-default-bridge=mesh-mlabs_bbone wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes 
      default-forwarding=yes default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no 
      security-profile=baki compression=no 

 2  R name="wlan_r52Hn_dookolna" mtu=1500 mac-address=00:0C:42:65:07:9E arp=enabled interface-type=Atheros 11N 
      mode=ap-bridge ssid="mlabsb" frequency=5180 band=5ghz-a/n channel-width=20mhz scan-list=default 
      wireless-protocol=unspecified wds-mode=dynamic-mesh wds-default-bridge=mesh-mlabs_bbone 
      wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes 
      default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no security-profile=mlabsb compression=no 
[admin@M] > /interface wireless wds print 
Flags: X - disabled, R - running, D - dynamic 
 0  RD name="wds1" mtu=1500 l2mtu=2290 mac-address=00:0C:42:62:CA:D7 arp=enabled 
       master-interface=wlan_r52hn_panel wds-address=00:0C:42:62:D3:37 

 1  RD name="wds2" mtu=1500 l2mtu=2290 mac-address=00:0C:42:65:07:9E arp=enabled 
       master-interface=wlan_r52Hn_dookolna wds-address=00:0C:42:62:D3:37 
[admin@M] > /interface mesh print         
Flags: X - disabled, R - running 
 0  R name="mesh-mlabs_bbone" mtu=1500 arp=enabled mac-address=02:9E:5D:BF:EF:55 auto-mac=yes 
      admin-mac=00:00:00:00:00:00 mesh-portal=no hwmp-default-hoplimit=32 hwmp-preq-waiting-time=4s 
      hwmp-preq-retries=2 hwmp-preq-destination-only=yes hwmp-preq-reply-and-forward=yes 
      hwmp-prep-lifetime=5m hwmp-rann-interval=10s hwmp-rann-propagation-delay=0.5 hwmp-rann-lifetime=22s 
      reoptimize-paths=no 
[admin@M] > /interface mesh port print 
Flags: X - disabled, I - inactive, D - dynamic 
 #    INTERFACE                                              MESH                                             
 0    eoip-mtl-mta8-mlabsb                                   mesh-mlabs_bbone                                 
 1    wlan_r52hn_panel                                       mesh-mlabs_bbone                                 
 2    ether2                                                 mesh-mlabs_bbone                                 
 3 I  ether3                                                 mesh-mlabs_bbone                                 
 4 I  wlan_ar5413-2.4G-a8                                    mesh-mlabs_bbone                                 
 5    wlan_r52Hn_dookolna                                    mesh-mlabs_bbone                                 
 6  D wds1                                                   mesh-mlabs_bbone                                 
 7  D wds2                                                   mesh-mlabs_bbone                                 
[admin@M] > /interface mesh fdb print  
Flags: A - active, R - root 
   MESH                    TYPE     MAC-ADDRESS       ON-INTERFACE                   LIFETIME     AGE         
A  mesh-mlabs_bbone        local    00:0C:42:44:A1:71                                             23m42s      
A  mesh-mlabs_bbone        local    00:0C:42:62:CA:D7                                             18m34s      
A  mesh-mlabs_bbone        neighbor 00:0C:42:62:D3:37 wds2                                        18m34s      
A  mesh-mlabs_bbone        local    00:0C:42:65:07:9E                                             18m34s      
A  mesh-mlabs_bbone        outsider 00:12:13:14:15:16 ether2                         4m42s        23m23s      
   mesh-mlabs_bbone        larval   00:16:D3:B1:ED:94                                4m32s        18m33s      
   mesh-mlabs_bbone        larval   02:08:F6:10:4F:C8                                4m38s        23m21s      
AR mesh-mlabs_bbone        neighbor 02:96:E5:E3:3C:6E eoip-mtl-mta8-mlabsb                        23m35s      
A  mesh-mlabs_bbone        local    02:9E:5D:BF:EF:55                                             23m47s
The part that looks bad to me is the forwarding db on M, particularly the line:
Code: Select all
   mesh-mlabs_bbone        larval   00:16:D3:B1:ED:94                                4m32s        18m33s
It is not flaged "Active" and it remains in larval state (what does it mean exactly) and forwarding for that mac fails.
On B, it looks like this:
Code: Select all
A  mlabs_bbone_mesh        outsider 00:16:D3:B1:ED:94 ether1                         5m           16m7s
and everything works fine - B answers laptop.

Any help please?
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