[f-nsp] Management stops working on Turboiron TI24X

[Chris Hellkvist]

Dear fellow Foundr^W^W Brocade-Users,

we have some issues with a Turboiron TI24X that is used as "stupid"
switch. After we have switched some traffic to this device (basically
passing trough a 20G LACP to a single 10G port over a tagged VLAN) the
box stops responding to all management traffic (in-band) from time to
time for up to 15 minutes. After the box has recovered the logs do not
show any bad signs (and traffic is flowing truth the TI all the time).
We are running latest switching code (TIS08001c.bin), but we have also
seen this issue with other software versions and devices in the past -
but always linked to that specific VLAN we have now moved to the new
TI24X.

Using "dm raw" i have not seen anything suspicious, just some IPv6 ND
and ARP stuff flying around:
RX [b9b1df]a8d0e55e4dc3   ->Broadcast  ARP Req S=80.81.193.39
D=80.81.194.60 port: 5
RX [b9b1df]2001:7f8::1a27:5051:c19d    ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1df]2001:7f8::1a27:5051:c19d    ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e0]fe80::669e:f3ff:fe22:3e03   ->ff02::1:ff00:2  ICMP Type=135 port: 5
RX [b9b1e0]80711f7477c5   ->Broadcast  ARP Req S=80.81.194.56
D=80.81.194.111 port: 5
RX [b9b1e0]fe80::8271:1fff:fe16:5f19   ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e0]00243895b600   ->Broadcast  ARP Req S=80.81.194.66
D=80.81.194.22 port: 5
RX [b9b1e0]2001:7f8::15cc:0:1          ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e0]2001:7f8::15cc:0:1          ->ff02::1:ff00:2  ICMP Type=135 port: 5
RX [b9b1e0]2001:7f8::15cc:0:1          ->ff02::1:ff00:2  ICMP Type=135 port: 5
RX [b9b1e0]fe80::46d3:caff:fe63:ec10   ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e0]fe80::669e:f3ff:fee0:1580   ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e1]fe80::669e:f3ff:fee0:1580   ->ff02::1:ff00:1  ICMP Type=135 port: 5
RX [b9b1e1]fe80::669e:f3ff:fee0:1580   ->ff02::1:ff00:2  ICMP Type=135 port: 5
RX [b9b1e1]fe80::669e:f3ff:fee0:1580   ->ff02::1:ff00:1  ICMP Type=135 port: 5

(The traffic passing trough the device is traffic from a Internet
exchange point, so quite "clean" stuff).

Any ideas on that?

Thanks,
-chris