topic Re: Spanning Tree through a Transparent PIX in Network Security https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729276#M985277 <HTML><HEAD></HEAD><BODY><P>Hi Andrew </P><P></P><P>It will not let BPDU's through by default but you can allow them through with an ethertype access-list. </P><P></P><P>Attached is a link to v7.0 config for pix covering ethertype access-lists. </P><P></P><P><A class="jive-link-custom" href="http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/traffic.html#wp1042206" target="_blank">http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/traffic.html#wp1042206</A></P><P></P><P>HTH</P><P></P><P>Jon</P><P></P></BODY></HTML> Wed, 04 Jul 2007 11:16:32 GMT Jon Marshall 2007-07-04T11:16:32Z Spanning Tree through a Transparent PIX https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729275#M985276 <P>Does a PIX in transparent mode break Spanning Tree communication between two switches ?</P><P>Is there an option to allow the layer two STP frames through a transparent PIX ?</P> Mon, 11 Mar 2019 10:39:52 GMT https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729275#M985276 andrew.goss 2019-03-11T10:39:52Z Re: Spanning Tree through a Transparent PIX https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729276#M985277 <HTML><HEAD></HEAD><BODY><P>Hi Andrew </P><P></P><P>It will not let BPDU's through by default but you can allow them through with an ethertype access-list. </P><P></P><P>Attached is a link to v7.0 config for pix covering ethertype access-lists. </P><P></P><P><A class="jive-link-custom" href="http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/traffic.html#wp1042206" target="_blank">http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/traffic.html#wp1042206</A></P><P></P><P>HTH</P><P></P><P>Jon</P><P></P></BODY></HTML> Wed, 04 Jul 2007 11:16:32 GMT https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729276#M985277 Jon Marshall 2007-07-04T11:16:32Z Re: Spanning Tree through a Transparent PIX https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729277#M985278 <HTML><HEAD></HEAD><BODY><P>Thanks, that is just the info I was looking for.</P><P></P><P></P></BODY></HTML> Wed, 04 Jul 2007 12:29:13 GMT https://community.cisco.com/t5/network-security/spanning-tree-through-a-transparent-pix/m-p/729277#M985278 andrew.goss 2007-07-04T12:29:13Z