02-22-2006 12:38 PM - edited 03-03-2019 01:57 AM
Hi;
I've moved a WIndows 2003 server from a dumb cisco switch to my 6509 Catalyst. Since doing this, I'm experiencing a wierd issue in that:
HostA= Windows XP client 198.177.133.61/24
HostB= Windows 2003 Server 198.177.133.12/24
Ping from HostA to HostB (Fail)
Ping from HostB to HostA (Success)
Ping from HostA to HostB (Success)
When the arp table on HostA expires, or I arp -d 198.177.133.12 I can no longer ping HostB from HostA.
Both of my SupII's are fitted with MSFC2 router cards. I am using HSRP. My standby address is 198.177.133.45.
Here, lookie:
interface Vlan10
description Legacy LAN
ip address 198.177.133.27 255.255.255.0
ip helper-address 172.30.192.82
ip helper-address 172.20.0.111
no ip redirects
standby 10 ip 198.177.133.45
standby 10 priority 195
standby 10 preempt
end
How come the arp process isn't sending Windows XP the mac address? Windows firewall is disable.
Is this a WIndows or MSFC router issue?
Regards
JSK
02-22-2006 01:02 PM
Ping from HostA= Windows XP client 198.177.133.61/24 to
HostB= Windows 2003 Server 198.177.133.12/24 does not even go to L3 or MSFC since they are in the same subnet. The ping from either hosts are sent directly to that host since they are in the same subnet. Question is why does the hostB does not respond to host A's ARP? Is the cam table of the 6509 populated for both devices? Are they both connected to the same 6509?
02-22-2006 01:21 PM
Hi;
Yes these are on the same switch 9/18 and 9/22. I'm running span so that I can monitor traffic from 9/1 and dump to 9/18. 9/1 is in vlan1 and 9/18 is on vlan10. maybe this has something to do with this issue. Do you think this is true?
Regards JSK
Destination : Port 9/18
Admin Source : Port 9/1
Oper Source : Port 9/1
Direction : transmit/receive
Incoming Packets: enabled
Learning : enabled
Multicast : enabled
Filter : -
Status : active
02-23-2006 01:55 AM
Check the ARP entries on all the devices involved resolve to the same MAC addresses. It may be a proxy-arp issue - check that the 2 Windows 2003 servers have the correct ARP entroes for each other.
I have seen odd things like this where the router proxy-arps due to a more specific route so the ARP cache on the client contains the router MAC for what would be a local device.
HTH
Andy
02-28-2006 09:34 PM
Hi,
I dont think you would be able to ping anything that is connected to 9/18 as it is the destination span. it would be in monitoring state. Correct me if i am wrong. Thanks
Regards,
Rathish
03-01-2006 05:26 AM
Hi Rathish,
Because I utilise the 'inpkts enable', I can ping.
However, I found the cause of this.
This Windows 2003 server is in VLAN10, and my router interface that I am monitoring is in VLAN1. If I shut down the span session, this server becomes vivible.
To correct this, I have changed the default route on my core 6509 switch routers (msfc2) to point to the router interface in vlan10 and then I changed the span session to monitor egress traffic at that vlan10 router infterface.
Kind Regards
Jeff
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