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03-03-2011 04:04 AM - edited 03-03-2011 04:47 AM
03-03-2011 04:04 AM - edited 03-03-2011 04:47 AM
			
				
					
						
							5500-EI - Packets go wrong port - ARP Problem? Flash corrupt?
						
					
					
				
			
		
	
			
	
	
	
	
	
I've 2 Stacks of 3x SuperStack 4 Switch 5500-EI PWR 28-Port Software Version 3Com OS V3.02.00s56.
Device 1 at Port Z <> Stack1 <=> 4xGb LACP-Trunk <=> Stack2 <=> Device2 on Port X and Device3 on Port Y
Port Z: ( Device with 10.3.1.247/24)
interface Ethernet1/0/45
 poe enable
 stp edged-port enable
 port access vlan 2
 undo jumboframe enable
 apply qos-profile default
Port X:
interface GigabitEthernet1/0/16
 stp edged-port enable
 broadcast-suppression 10
 port access vlan 2
 undo jumboframe enable
 apply qos-profile default0001
Port Y: (Device with IP 10.3.1.205/24)
interface GigabitEthernet1/0/8
 stp edged-port enable
 broadcast-suppression 10
 port access vlan 2
 undo jumboframe enable
 apply qos-profile default0001
While monitoring with tethereal at Port X i see the traffic for Port Y
22.728871   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 24.729487   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 25.729555   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 26.729919   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 87.797523   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 88.797327   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 89.797547   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 90.797808   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 91.807956   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 92.817851   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 93.818168   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 94.817846   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 95.818125   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 96.818320   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 97.818601   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 98.818368   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
 99.818662   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
100.818816   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
101.819033   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
102.819308   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
103.820089   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
140.929792   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
143.931084   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
144.930767   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
145.931135   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
146.951693   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
147.971634   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
148.992102   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
188.028108   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
189.028257   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
190.028525   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
191.028811   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
192.028580   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
193.028782   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
194.028973   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
195.029214   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
196.029105   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
197.029137   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
198.029459   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
199.029164   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
200.029401   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
201.029618   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
202.029386   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
203.029695   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
204.029634   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
205.029885   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
206.029793   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
207.030132   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
208.030204   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
209.030454   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
210.030360   10.3.1.247 -> 10.3.1.205   ICMP Echo (ping) reply
You see that all went right for ~ 40 Seconds and then it packets went wrong. Why?
- both mac-adresses are dynamic in the arp table all the time
 - gratiuous arp is enabled by default
 - Mac address aging time: 300s
 - proxy arp is not used anywhere
 
Any Help Will be greatly appreciated!