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	<title>Comments for Stefan Jagger</title>
	<atom:link href="http://www.stefanjagger.co.uk/comments/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.stefanjagger.co.uk</link>
	<description>VMware, HP c7000 and EVA Storage guru based in Reading, UK</description>
	<lastBuildDate>Wed, 01 Sep 2010 13:14:21 +0000</lastBuildDate>
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		<title>Comment on Using a HP 5400 switch to route between VLANs with access list security by Stefan</title>
		<link>http://www.stefanjagger.co.uk/06/using-a-hp-5400-switch-to-route-between-vlans-with-access-list-security/comment-page-1/#comment-22</link>
		<dc:creator>Stefan</dc:creator>
		<pubDate>Wed, 01 Sep 2010 13:14:21 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=35#comment-22</guid>
		<description>Hi Stephen

Sure. First you should take off &quot;ip default-gateway&quot; as this and &quot;ip routing&quot; should not be enabled together. Your default ip route is essentially doing the same thing.

For the access-list you could use something like...
deny ip 10.56.68.1 0.0.3.255 172.16.9.1 0.0.0.127
... which would block traffic going from Curric to Admin.

To test ip routing, ping between interfaces. If the interfaces ping, layer 3 routing is working.

If you&#039;re still having problems you might be interested in a day or so (depending how many switches) of my time on site to resolve this for you in time for term start?

Stefan</description>
		<content:encoded><![CDATA[<p>Hi Stephen</p>
<p>Sure. First you should take off &#8220;ip default-gateway&#8221; as this and &#8220;ip routing&#8221; should not be enabled together. Your default ip route is essentially doing the same thing.</p>
<p>For the access-list you could use something like&#8230;<br />
deny ip 10.56.68.1 0.0.3.255 172.16.9.1 0.0.0.127<br />
&#8230; which would block traffic going from Curric to Admin.</p>
<p>To test ip routing, ping between interfaces. If the interfaces ping, layer 3 routing is working.</p>
<p>If you&#8217;re still having problems you might be interested in a day or so (depending how many switches) of my time on site to resolve this for you in time for term start?</p>
<p>Stefan</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Using a HP 5400 switch to route between VLANs with access list security by Stephen</title>
		<link>http://www.stefanjagger.co.uk/06/using-a-hp-5400-switch-to-route-between-vlans-with-access-list-security/comment-page-1/#comment-21</link>
		<dc:creator>Stephen</dc:creator>
		<pubDate>Wed, 01 Sep 2010 11:58:11 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=35#comment-21</guid>
		<description>Hi Stefan,

Below is effectively our config file. VLAN 1 (WAN) links to our internet router. 

Basically we don&#039;t want to give VLANs 10,30,40 or 50 access to the Admin VLAN (20) but want all VLANs access to VLAN 1 so they can get onto the internet.

You will see that we have ip routing enabled so hopefully the switch is doing layer 3 switching taking the load off our router (on VLAN 1). We have set ip route to hopefully route any unknown traffic out to the gateway (last line of the config).

Could you suggest a suitable ACL to achieve this?

Thanks,

Stephen

ip default-gateway 10.53.160.73 
ip routing 
snmp-server community &quot;public&quot; Unrestricted 
vlan 1 
   name &quot;WAN&quot; 
   untagged B1 
   ip address 10.53.160.78 255.255.255.0 
   no untagged A1-A24,B2-B22,Trk1 
   exit 
vlan 10 
   name &quot;Curriculum_Network&quot; 
   untagged A1-A24,B2-B21,Trk1 
   ip address 10.56.68.1 255.255.252.0 
   tagged B1 
   exit 
vlan 20 
   name &quot;Admin_Network&quot; 
   untagged B22 
   ip address 172.16.9.1 255.255.255.128 
   tagged B1 
   exit 
vlan 30 
   name &quot;Teacher_wireless&quot; 
   ip helper-address 10.56.68.15 
   ip address 10.58.228.1 255.255.255.0 
   tagged A1-A24,B1-B21,Trk1 
   exit 
vlan 40 
   name &quot;Untrusted_wireless&quot; 
   ip helper-address 10.56.68.15 
   ip address 10.58.229.1 255.255.255.0 
   tagged A1-A24,B2-B21,Trk1 
   exit 
vlan 50 
   name &quot;Trusted_wireless&quot; 
   ip helper-address 10.56.68.15 
   ip address 10.58.230.1 255.255.254.0 
   tagged A1-A24,B2-B21,Trk1 
   exit 
ip route 0.0.0.0 0.0.0.0 10.53.160.73</description>
		<content:encoded><![CDATA[<p>Hi Stefan,</p>
<p>Below is effectively our config file. VLAN 1 (WAN) links to our internet router. </p>
<p>Basically we don&#8217;t want to give VLANs 10,30,40 or 50 access to the Admin VLAN (20) but want all VLANs access to VLAN 1 so they can get onto the internet.</p>
<p>You will see that we have ip routing enabled so hopefully the switch is doing layer 3 switching taking the load off our router (on VLAN 1). We have set ip route to hopefully route any unknown traffic out to the gateway (last line of the config).</p>
<p>Could you suggest a suitable ACL to achieve this?</p>
<p>Thanks,</p>
<p>Stephen</p>
<p>ip default-gateway 10.53.160.73<br />
ip routing<br />
snmp-server community &#8220;public&#8221; Unrestricted<br />
vlan 1<br />
   name &#8220;WAN&#8221;<br />
   untagged B1<br />
   ip address 10.53.160.78 255.255.255.0<br />
   no untagged A1-A24,B2-B22,Trk1<br />
   exit<br />
vlan 10<br />
   name &#8220;Curriculum_Network&#8221;<br />
   untagged A1-A24,B2-B21,Trk1<br />
   ip address 10.56.68.1 255.255.252.0<br />
   tagged B1<br />
   exit<br />
vlan 20<br />
   name &#8220;Admin_Network&#8221;<br />
   untagged B22<br />
   ip address 172.16.9.1 255.255.255.128<br />
   tagged B1<br />
   exit<br />
vlan 30<br />
   name &#8220;Teacher_wireless&#8221;<br />
   ip helper-address 10.56.68.15<br />
   ip address 10.58.228.1 255.255.255.0<br />
   tagged A1-A24,B1-B21,Trk1<br />
   exit<br />
vlan 40<br />
   name &#8220;Untrusted_wireless&#8221;<br />
   ip helper-address 10.56.68.15<br />
   ip address 10.58.229.1 255.255.255.0<br />
   tagged A1-A24,B2-B21,Trk1<br />
   exit<br />
vlan 50<br />
   name &#8220;Trusted_wireless&#8221;<br />
   ip helper-address 10.56.68.15<br />
   ip address 10.58.230.1 255.255.254.0<br />
   tagged A1-A24,B2-B21,Trk1<br />
   exit<br />
ip route 0.0.0.0 0.0.0.0 10.53.160.73</p>
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	</item>
	<item>
		<title>Comment on How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 by Stefan</title>
		<link>http://www.stefanjagger.co.uk/08/how-vsphere-4-1-network-io-control-changed-the-way-we-use-hp-flex-10/comment-page-1/#comment-20</link>
		<dc:creator>Stefan</dc:creator>
		<pubDate>Wed, 01 Sep 2010 11:50:59 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=123#comment-20</guid>
		<description>Hi Matt

You could always set traffic shaping policies on your dvPortGroup to put top end limits on ingress or egress traffic.

I actually thought the shares and limits were applied to both ingress and egress combined, as &#039;network traffic&#039; let&#039;s say. Otherwise a value on HostX could potentially surpass the same shares/limits set on HostY. Where did you read this?

Stefan</description>
		<content:encoded><![CDATA[<p>Hi Matt</p>
<p>You could always set traffic shaping policies on your dvPortGroup to put top end limits on ingress or egress traffic.</p>
<p>I actually thought the shares and limits were applied to both ingress and egress combined, as &#8216;network traffic&#8217; let&#8217;s say. Otherwise a value on HostX could potentially surpass the same shares/limits set on HostY. Where did you read this?</p>
<p>Stefan</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 by MattG</title>
		<link>http://www.stefanjagger.co.uk/08/how-vsphere-4-1-network-io-control-changed-the-way-we-use-hp-flex-10/comment-page-1/#comment-19</link>
		<dc:creator>MattG</dc:creator>
		<pubDate>Wed, 01 Sep 2010 02:38:52 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=123#comment-19</guid>
		<description>I have wondered the same thing.  The one difference I did notice was that NetIOC only controls network traffic one way,  while I am assuming Flex-10 does it both (ingress and egress).</description>
		<content:encoded><![CDATA[<p>I have wondered the same thing.  The one difference I did notice was that NetIOC only controls network traffic one way,  while I am assuming Flex-10 does it both (ingress and egress).</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 by Tweets that mention How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 &#124; Stefan Jagger -- Topsy.com</title>
		<link>http://www.stefanjagger.co.uk/08/how-vsphere-4-1-network-io-control-changed-the-way-we-use-hp-flex-10/comment-page-1/#comment-18</link>
		<dc:creator>Tweets that mention How vSphere 4.1 Network I/O Control changed the way we use HP Flex-10 &#124; Stefan Jagger -- Topsy.com</dc:creator>
		<pubDate>Tue, 31 Aug 2010 21:03:08 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=123#comment-18</guid>
		<description>[...] This post was mentioned on Twitter by Patrick Paijmans, Stefan Jagger. Stefan Jagger said: blogged: VMware Network I/O Control changed the way we use HP Flex-10 http://bit.ly/arZkFe [...]</description>
		<content:encoded><![CDATA[<p>[...] This post was mentioned on Twitter by Patrick Paijmans, Stefan Jagger. Stefan Jagger said: blogged: VMware Network I/O Control changed the way we use HP Flex-10 <a href="http://bit.ly/arZkFe" rel="nofollow">http://bit.ly/arZkFe</a> [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Using a HP 5400 switch to route between VLANs with access list security by sjagger</title>
		<link>http://www.stefanjagger.co.uk/06/using-a-hp-5400-switch-to-route-between-vlans-with-access-list-security/comment-page-1/#comment-17</link>
		<dc:creator>sjagger</dc:creator>
		<pubDate>Fri, 27 Aug 2010 07:58:59 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=35#comment-17</guid>
		<description>Hi Stephen

In the above example CURRIC can talk to ADMIN but not the other way around.

I&#039;ll try explain:
When VLANs are defined on an HP switch they won&#039;t talk to each other until you either:
a.) enable ip default-gateway to route between the VLANs via a router (sometimes called router on a stick).
b.) enable ip routing on the switch which will route between the VLANs without a router.

ip routing is the preferred method as it keeps bandwidth on the backplane of a switch instead of creating a link bottleneck to a router.

When ip routing is enabled the switch will route between all VLANs with an ip address, without security on the VLANs. This is where the ip access-list extended &quot;ACL_NAME&quot; comes in to play, which is then applied to each of the VLANs you would like to secure with ip access-group ACL_NAME vlan.

Let me know how you get on. If you&#039;re still struggling i&#039;ll email you, we might be able to help over the phone.

Stefan</description>
		<content:encoded><![CDATA[<p>Hi Stephen</p>
<p>In the above example CURRIC can talk to ADMIN but not the other way around.</p>
<p>I&#8217;ll try explain:<br />
When VLANs are defined on an HP switch they won&#8217;t talk to each other until you either:<br />
a.) enable ip default-gateway to route between the VLANs via a router (sometimes called router on a stick).<br />
b.) enable ip routing on the switch which will route between the VLANs without a router.</p>
<p>ip routing is the preferred method as it keeps bandwidth on the backplane of a switch instead of creating a link bottleneck to a router.</p>
<p>When ip routing is enabled the switch will route between all VLANs with an ip address, without security on the VLANs. This is where the ip access-list extended &#8220;ACL_NAME&#8221; comes in to play, which is then applied to each of the VLANs you would like to secure with ip access-group ACL_NAME vlan.</p>
<p>Let me know how you get on. If you&#8217;re still struggling i&#8217;ll email you, we might be able to help over the phone.</p>
<p>Stefan</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Using a HP 5400 switch to route between VLANs with access list security by Stephen</title>
		<link>http://www.stefanjagger.co.uk/06/using-a-hp-5400-switch-to-route-between-vlans-with-access-list-security/comment-page-1/#comment-16</link>
		<dc:creator>Stephen</dc:creator>
		<pubDate>Fri, 27 Aug 2010 07:04:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=35#comment-16</guid>
		<description>Sorry, I mean does this ACL mean that the Admin and Curriculum VLANs can talk to each other, or are prevented from doing so?</description>
		<content:encoded><![CDATA[<p>Sorry, I mean does this ACL mean that the Admin and Curriculum VLANs can talk to each other, or are prevented from doing so?</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Using a HP 5400 switch to route between VLANs with access list security by Stephen</title>
		<link>http://www.stefanjagger.co.uk/06/using-a-hp-5400-switch-to-route-between-vlans-with-access-list-security/comment-page-1/#comment-15</link>
		<dc:creator>Stephen</dc:creator>
		<pubDate>Fri, 27 Aug 2010 07:03:58 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=35#comment-15</guid>
		<description>Does ACL mean that the Admin and Curriculum VLANS can talk to each other, or a are prevented from doing so?</description>
		<content:encoded><![CDATA[<p>Does ACL mean that the Admin and Curriculum VLANS can talk to each other, or a are prevented from doing so?</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Passing the VCP (VCP410) exam by All Things Virtual 16 &#171; TheSaffaGeek</title>
		<link>http://www.stefanjagger.co.uk/08/passing-the-vcp-vcp410-exam/comment-page-1/#comment-14</link>
		<dc:creator>All Things Virtual 16 &#171; TheSaffaGeek</dc:creator>
		<pubDate>Thu, 26 Aug 2010 15:51:39 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=73#comment-14</guid>
		<description>[...] big congratulations and thank you to Stefan Jagger for the passing of his VCP4 exam and for mentioning and linking to my VCP4 resources pages. always nice to get a bit of traffic from different [...]</description>
		<content:encoded><![CDATA[<p>[...] big congratulations and thank you to Stefan Jagger for the passing of his VCP4 exam and for mentioning and linking to my VCP4 resources pages. always nice to get a bit of traffic from different [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Passing the VCP (VCP410) exam by Sat Test Preparation &#124; Sat Secrets Revealed: Get 2200+ On The Sat &#124; sat2subjecttests.com</title>
		<link>http://www.stefanjagger.co.uk/08/passing-the-vcp-vcp410-exam/comment-page-1/#comment-13</link>
		<dc:creator>Sat Test Preparation &#124; Sat Secrets Revealed: Get 2200+ On The Sat &#124; sat2subjecttests.com</dc:creator>
		<pubDate>Mon, 23 Aug 2010 05:48:23 +0000</pubDate>
		<guid isPermaLink="false">http://www.stefanjagger.co.uk/?p=73#comment-13</guid>
		<description>[...] Passing the VCP (VCP410) exam &#124; Stefan Jagger [...]</description>
		<content:encoded><![CDATA[<p>[...] Passing the VCP (VCP410) exam | Stefan Jagger [...]</p>
]]></content:encoded>
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