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--- cisco:switch [2009/05/25 00:35]
127.0.0.1 external edit
+++ cisco:switch [2010/04/16 23:56]
a
@@ Line 20: / Line 20: @@
 for each interface
+===== Make Catalyst switch silent (The Invisible Catalyst Switch) =====
+<note tip>
+If you've ever looked at a packet capture from a Cisco Catalyst switch with a default configuration, you know they produce a good amount of ambient noise out of the box. CDP, STP, DTP, keepalives - these are all turned on by default and, combined, generate a significant amount of traffic. \\
+**Original notes: http://packetlife.net/blog/2010/apr/15/invisible-catalyst-switch/ (10x Jeremy Stretch)**
+</note>
+**Turning off CDP**
+   S1(config)# no cdp run
+**Turning off DTP**
+   S1(config)# interface range f0/1 -24
+   S1(config-if-range)# switchport mode access
+   S1(config-if-range)# switchport nonegotiate
+**Turning off STP**
+   S1(config)# no spanning-tree vlan 1
+**Turning off Ethernet Keepalives**
+   S1(config)# interface range f0/1 -24
+   S1(config-if-range)# no keepalive
 ===== Security on L2 based equipment =====