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CISCO 2960 VLAN Routing

Hello,

I have recently inherited an existing network which has two stacked Cisco 2960's that connect to a Cisco 5510 ASA.  Currently the Cisco 2960's handles its own routing for gateways via the VLAN classifications.  Which look like this:

interface Vlan1

description Production

ip address 10.x.99.1 255.255.255.0

ip helper-address 192.168.x.4

no ip redirects

no ip unreachables

no ip proxy-arp

!

interface Vlan5

description IP Phones

ip address 10.x.50.1 255.255.255.0

ip helper-address 192.168.x.4

no ip redirects

no ip unreachables

no ip proxy-arp

!

interface Vlan11

description Production

ip address 10.x.100.1 255.255.255.0

ip helper-address 192.168.x.4

no ip redirects

no ip unreachables

no ip proxy-arp

!

interface Vlan22

description Legacy Production

ip address 192.168.x.254 255.255.255.0

ip helper-address 192.168.x.4

no ip redirects

no ip unreachables

no ip proxy-arp

!

192.168.x.4 is the DC for the domain.

ip route 0.0.0.0 0.0.0.0 192.168.x.250

ip http server

ip http secure-server

We are experiencing a 2 to 14 % packet loss on our traffic from the 10.x.100.1 network to the 192.168.x.254.  The other issue we seem to be having is that same traffic is making its way out to our firewall.  For example back up server (Port 1/0/30 VLAN11) 10.x.100.22 (Subnet 255.255.255.0 - GW: 10.x.100.1) is backing up (Port 1/0/45 VLAN22) 192.168.x.15 (Subnet 255.255.255.0 - GW: 192.168.x.254) using Netbackup.  The traffic for this operation is still going through the firewall which is creating unnecessary traffic for the network.

Do we need to have a layer 3 switch to do the gateway routing?

Why is there such high packet loss on a local switch?

Why does local traffic go outside of the switch?

Help on any one of these would be great.

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