6500 is core switch, have 2 vlan
vlan 101 (server)
ip add 172.16.1.254/24
vlan 22 (client)
ip add 172.16.22.254/24
interface Vlan101
ip address 172.16.1.254 255.255.255.0
ip helper-address 172.16.1.102
no ip proxy-arp
!
interface Vlan22
ip address 172.16.22.254 255.255.255.0
ip helper-address 172.16.1.102
no ip proxy-arp
!
ip route 0.0.0.0 0.0.0.0 172.16.1.253
Internet Proxy server: 172.16.1.212 (vlan101)
Internet Firewall: 172.16.1.253 (vlan101)
All Client config proxy server on Internet Explorer
When Client on vlan22 access to Internet is very slow. But I move client to vlan 101 and change gateway to 172.16.1.253 then access to internet is fine
So I enter "ip proxy-arp" command on interface vlan101, everything is fine internet is fine and fast.
I think because Firewall is same subnet with proxy server and icmp redirect is enable, so occur Internet slow problem.
I think "ip proxy-arp" command make icmp redirect to disable.
But I am not sure that "ip proxy-arp" or icmp redirect is a problem
Please suggest me for this reason or share a document that why enter "ip proxy-arp" can reslove this problem?
I can't to explain my customer that icmp redirect is problem because I not found the document or word that explain icmp redirect can make a network to slow.
