<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 27 Oct 2008, at 18:09, Charles Ball wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="hmmessage" style="font-size: 10pt; font-family: Tahoma; ">I found this in the 3.8 manual for xmr/mx:<br> <br><font face="Helvetica-Bold" color="#0000ff"><font face="Helvetica-Bold" color="#000000" size="3"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">Configuring a PE to Allow Routes with its AS Number</div></font></font><font face="Helvetica"><font face="Helvetica"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">BGP rejects routes that contain its own AS number within its AS_PATH attribute to prevent routing loops. In an</font></div></font></font><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font face="Helvetica"><font face="Helvetica"><font size="3">MPLS/VPN hub and spoke topology this can stop legitimate routes from being accepted. The<span class="Apple-converted-space"> </span></font></font></font><font face="Times New Roman" size="3">allowas-in</font></div><font face="Helvetica"><font face="Helvetica"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">command fixes this problem by allowing you to set a parameter that disables the AS_PATH check function for</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">routes learned from a specified location.</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">To configure a PE to disable the AS_PATH check function for routes sent to it by its BGP neighbor (a CE router</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">with the IP address 33.33.36.2) for a maximum limit of 3 occurrences of the route, enter the following command at</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; "><font size="3">the BGP VRF configuration level.</font></div></font></font><font face="Courier"><font face="Courier" size="3"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; ">NetIron(config-bgp-ipv4u-vrf)# neighbor 33.33.36.2 allowas-in 3</div></font></font></div></span></blockquote><div><br></div><div><br></div>It seems this is a MRX/MX feature only? Any ideas how to do this on a BigIron?</div><div><br></div><div>Regards,</div><div><br></div><div>Frank</div></body></html>