[Olsr-users] ETX-LQ calculations questions

[Alexey Shinkin]

Thank for reply  .

Could anyone please explain the following . 

I have a test configurations with two Linksys WRT54GL routers running Freifunk firmware with olsrd 0.4.10 .  Office conditions, radio link is perfect. 

Routers have the following olsr.conf :

DebugLevel              0
IpVersion               4
AllowNoInt              yes
Pollrate                0.3
TcRedundancy            2
MprCoverage             7
LinkQualityFishEye      1
LinkQualityWinSize      10 
LinkQualityDijkstraLimit 0 1.0
LoadPlugin "olsrd_txtinfo.so.0.1"
{
        PlParam "Accept" "127.0.0.1"
}
IpcConnect
{
        MaxConnections  1
        Host            127.0.0.1
        Net 192.168.2.0 255.255.255.0
}
LinkQualityLevel 2
UseHysteresis no
Interface "eth1"
{
        HelloInterval           0.5
        HelloValidityTime       10.0
        TcInterval              1.0
        TcValidityTime          5.0
        MidInterval             3.0
        MidValidityTime         15.0
        HnaInterval             10.0
        HnaValidityTime         50.0
}


One of the routers has additional HNA section . 
And I got a strange ETX values on both routers. 

On the first  ( 192.168.10.10): 

Table: Links
Local IP        remote IP       Hysteresis      LinkQuality     lost    total   NLQ     ETX
192.168.10.10   192.168.10.5    0.00              1.25               0       10      0.24    3.29

Table: Neighbors
IP address      SYM     MPR     MPRS    Willingness     2 Hop Neighbors
192.168.10.5    YES     NO        NO         3                                0

Table: Topology
Destination IP  Last hop IP     LQ      ILQ     ETX
192.168.10.10   192.168.10.5    0.24    0.24    16.92

Table: HNA
Network Netmask Gateway
192.168.2.0     255.255.255.0   192.168.10.10

Table: Routes
Destination     Gateway Metric  ETX     Interface       Type
192.168.10.5    192.168.10.5    1       3.29    eth1    HOST



On the second  ( 192.168.10.5): 

Table: Links
Local IP            remote IP       Hysteresis      LinkQuality     lost    total   NLQ    ETX
192.168.10.5    192.168.10.10   0.00                    1.13              1       10      0.24    3.66

Table: Neighbors
IP address      SYM     MPR     MPRS    Willingness     2 Hop Neighbors
192.168.10.10   YES     NO      NO             3                      0

Table: Topology
Destination IP  Last hop IP      LQ      ILQ     ETX
192.168.10.5    192.168.10.10   0.12    0.24    34.96

Table: HNA
Network Netmask Gateway
192.168.2.0     255.255.255.0   192.168.10.10

Table: Routes
Destination     Gateway          Metric  ETX     Interface       Type
192.168.10.10   192.168.10.10   1       3.66    eth1             HOST
192.168.2.0     192.168.10.10    1                   eth1            HNA


So, I am a bit surprised with so low LQ and NLQ values in Topology section and 
why LQ in Links table is >1 and not equal to LQ in Topology ? 


Thanks.



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