I have identified a shortcoming the the 5212 FW revision 3.1.0.13 as follows:

The switch has Spanning Tree Disabled (This is necessary as it is connected to an IX which insists on it being disabled in it's AUP) and 24 VLANs configured.

When the switch cold or warm starts, it enters a state when even though all appears normal, it is not forwarding any packets. You can ping the switch on it's management IP, but it refuses to forward packets.

Observations which lead me to thing this is a bug rather than a hardware fault are as follows:

1. If you reduce the number of VLANs in the switch's configuration to 5 or less, the problem goes away. At 6 VLANS the problem re-appears.

2. Also when the switch is in the 'Not Forwarding' mode, if you briefly unplug a the network cable from a port and plug it straight back in again, that prot then starts to forward.

3. If spanning tree is enabled, the switch functions perfectly.

4. if (through the CLI) you briefly issue a spanning-tree, immediately followed by a no spanning-tree -- the switch bursts into life !

Please help -- this is driving me crazy!

Thanks,

Simon

Configuration extract attached below:

 

!
!
snmp-server community private rw
snmp-server community public ro
!
!
!
vlan database
 vlan 1 name PX-SEGMENT media ethernet state active
 vlan 2 name  DMZ-SEGMENT media ethernet state active
 vlan 4 name  XPE1-SEGMENT media ethernet state active
 vlan 5 name  XPE2-SEGMENT media ethernet state active
 vlan 500 name NSE-TEST media ethernet state active
 vlan 550 name XPE-LONAP media ethernet state active
 vlan 612 name AS13005 media ethernet state active
 vlan 864 name AS15635 media ethernet state active
 vlan 989 name XPE-TEST media ethernet state active
 vlan 999 name XPE-PEERING1 media ethernet state active
 vlan 1146 name XPE-KPN1 media ethernet state active
 vlan 1147 name XPE-GRIFFIN media ethernet state active
 vlan 1150 name XPE-TISCALI media ethernet state active
 vlan 2047  name AS25396 media ethernet state active
 vlan 2069 name AS15435 media ethernet state active
 vlan 2112 name AS10310 media ethernet state active
 vlan 2114 name AS8068 media ethernet state active
 vlan 2141 name AS2082 media ethernet state active
 vlan 2178 name AS12859 media ethernet state active
 vlan 2192 name AS24851 media ethernet state active
 vlan 2244 name AS25463 media ethernet state active
 vlan 2312 name AS5588 media ethernet state active
 vlan 2322 name AS9191 media ethernet state active
 vlan 2490 name AS2818 media ethernet state active
!
!
!
interface ethernet 1/1
 switchport allowed vlan add 1 untagged
 switchport native vlan 1
 switchport allowed vlan add 612,864,2047,2069,2112,2114,2141,2178,2192,2244,2312,2322,2490 tagged
!
interface ethernet 1/2
 switchport allowed vlan add 1 untagged
 switchport native vlan 1
 switchport allowed vlan add 612,864,2047,2069,2112,2114,2141,2178,2192,2244,2312,2322,2490 tagged
!
interface ethernet 1/3
 switchport allowed vlan add 1 untagged
 switchport native vlan 1
 switchport allowed vlan add 612,864,2047,2069,2112,2114,2141,2178,2192,2244,2312,2322,2490 tagged
!
interface ethernet 1/4
 description XPE1
 no negotiation
 switchport allowed vlan add 4 untagged
 switchport native vlan 4
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/5
 description XPE1A
 switchport allowed vlan add 4 untagged
 switchport native vlan 4
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/6
 description XPE1B
 switchport allowed vlan add 4 untagged
 switchport native vlan 4
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/7
 description XPE2
 no negotiation
 switchport allowed vlan add 5 untagged
 switchport native vlan 5
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/8
 description XPE2A
 switchport allowed vlan add 5 untagged
 switchport native vlan 5
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/9
 description XPE2B
 switchport allowed vlan add 5 untagged
 switchport native vlan 5
 switchport allowed vlan remove 1
 switchport allowed vlan add 500,550,989,999,1146-1147,1150 tagged
!
interface ethernet 1/10
 description 10-DMZ
 switchport allowed vlan add 2 untagged
 switchport native vlan 2
 switchport allowed vlan remove 1
!
interface ethernet 1/11
 description 11-DMZ
 switchport allowed vlan add 2 untagged
 switchport native vlan 2
 switchport allowed vlan remove 1
!
interface ethernet 1/12
 description 12-DMZ
 switchport allowed vlan add 2 untagged
 switchport native vlan 2
 switchport allowed vlan remove 1
!
!
!
interface vlan 1
 ip address 217.18.81.130 255.255.255.0
!

ip default-gateway  217.18.81.254
!
!
jumbo frame
!
!
line console
!
!
line vty
!
!
!
no spanning-tree
mac-address-table aging-time 60
!
!
end
!