{"id":1576,"date":"2011-08-31T06:04:59","date_gmt":"2011-08-30T22:04:59","guid":{"rendered":"http:\/\/www.slyar.com\/blog\/?p=1576"},"modified":"2022-07-03T15:51:39","modified_gmt":"2022-07-03T22:51:39","slug":"ccnp-labs-bgp-aggregate-basic","status":"publish","type":"post","link":"http:\/\/www.slyar.com\/blog\/ccnp-labs-bgp-aggregate-basic.html","title":{"rendered":"CCNP\u5b9e\u9a8c:BGP\u8def\u7531\u805a\u5408\u57fa\u7840"},"content":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a<span style=\"color: #0000ff;\">\u59dc\u5357(Slyar) <\/span>\u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (<a title=\"Slyar\" href=\"http:\/\/www.slyar.com\" target=\"_blank\" rel=\"noopener\">www.slyar.com<\/a>) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u73af\u5883\u3011<\/span><\/p>\n<p>C3640-IK9O3S-M Version 12.4(10)<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u76ee\u7684\u3011<\/span><\/p>\n<p>\u9a8c\u8bc1BGP\u7684\u8def\u7531\u805a\u5408<\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u62d3\u6251\u3011<\/span><\/p>\n<p><a href=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-31_044509.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1577\" title=\"BGP\u8def\u7531\u805a\u5408\" src=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-31_044509.png\" alt=\"\" width=\"523\" height=\"228\" srcset=\"http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-31_044509.png 523w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-31_044509-150x65.png 150w, http:\/\/www.slyar.com\/blog\/wp-content\/uploads\/2011\/08\/2011-08-31_044509-300x131.png 300w\" sizes=\"auto, (max-width: 523px) 100vw, 523px\" \/><\/a><\/p>\n<p><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u63cf\u8ff0\u3011<\/span><\/p>\n<p>1\u3001\u5728R2\u4e0a\u4f7f\u7528\u624b\u5de5\u521b\u5efa\u805a\u5408\u9759\u6001\u8def\u7531\u5e76\u5ba3\u544a\u9759\u6001\u8def\u7531\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/p>\n<p>2\u3001\u5728R2\u4e0a\u4f7f\u7528BGP\u8def\u7531\u805a\u5408\u547d\u4ee4aggregate-address\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/p>\n<p>3\u3001\u5728R1\u4e0a\u4f7f\u7528BGP\u8def\u7531\u805a\u5408\u547d\u4ee4aggregate-address\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/p>\n<p>4\u3001\u5728R1\u4e0a\u7ed3\u5408\u4f7f\u7528suppress-map\u5b9e\u73b0\u90e8\u5206BGP\u8def\u7531\u96c6\u5408<\/p>\n<p><!--more--><span style=\"color: #0000ff;\">\u3010\u5b9e\u9a8c\u6b65\u9aa4\u3011<\/span><\/p>\n<p><span style=\"color: #0000ff;\">1\u3001R1\u57fa\u672c\u914d\u7f6e<\/span><\/p>\n<p>!<br \/>\ninterface Serial0\/0<br \/>\nip address 12.0.0.1 255.255.255.0<br \/>\nserial restart-delay 0<br \/>\nclock rate 64000<br \/>\n!<br \/>\nrouter bgp 1<br \/>\nno synchronization<br \/>\nbgp router-id 1.1.1.1<br \/>\nneighbor 12.0.0.2 remote-as 2<br \/>\nno auto-summary<br \/>\n!<\/p>\n<p><span style=\"color: #0000ff;\">2\u3001R2\u57fa\u672c\u914d\u7f6e<\/span><\/p>\n<p>!<br \/>\ninterface Loopback0<br \/>\nip address 200.1.16.1 255.255.255.0<br \/>\n!<br \/>\ninterface Loopback1<br \/>\nip address 200.1.17.1 255.255.255.0<br \/>\n!<br \/>\ninterface Loopback2<br \/>\nip address 200.1.18.1 255.255.255.0<br \/>\n!<br \/>\ninterface Loopback3<br \/>\nip address 200.1.19.1 255.255.255.0<br \/>\n!<br \/>\ninterface Serial0\/0<br \/>\nip address 12.0.0.2 255.255.255.0<br \/>\n!<br \/>\nrouter bgp 2<br \/>\nno synchronization<br \/>\nbgp router-id 2.2.2.2<br \/>\nneighbor 12.0.0.1 remote-as 1<br \/>\nno auto-summary<br \/>\n!<\/p>\n<p><span style=\"color: #0000ff;\">3\u3001\u5728R2\u4e0a\u4f7f\u7528\u624b\u5de5\u521b\u5efa\u805a\u5408\u9759\u6001\u8def\u7531\u5e76\u5ba3\u544a\u9759\u6001\u8def\u7531\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/span><\/p>\n<p>\u8be5\u65b9\u6cd5\u53ea\u80fd\u4f7f\u7528\u5728\u4ea7\u751f\u660e\u7ec6\u8def\u7531\u7684\u8def\u7531\u5668R2\u4e0a\uff0c\u5e76\u4e14\u65e0\u9700\u5728R2\u4e0a\u901a\u544a\u660e\u7ec6\u8def\u7531\uff0c\u9996\u5148\u521b\u5efa\u4e00\u6761\u6307\u5411NULL0\u63a5\u53e3\u7684\u6c47\u603b\u9759\u6001\u8def\u7531\uff1a<\/p>\n<p>R2(config)#ip route 200.1.16.0 255.255.252.0 Null0<\/p>\n<p>\u63a5\u7740\u5c06\u6c47\u603b\u7684\u9759\u6001\u8def\u7531\u4eceBGP\u53d1\u5e03\u51fa\u53bb<\/p>\n<p>R2(config)#router bgp 2<br \/>\nR2(config-router)#network 200.1.16.0 mask 255.255.252.0<\/p>\n<p>\u6b64\u65f6\u5728R1\u4e0a\u5c31\u53ef\u4ee5\u770b\u5230\u6c47\u603b\u8def\u7531\u4e86<\/p>\n<p>R1#sh ip bgp<br \/>\nBGP table version is 2, local router ID is 1.1.1.1<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\n*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<\/p>\n<p><span style=\"color: #0000ff;\">4\u3001\u6e05\u96643\u7684\u914d\u7f6e\uff0c\u5728R2\u4e0a\u4f7f\u7528BGP\u8def\u7531\u805a\u5408\u547d\u4ee4aggregate-address\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/span><\/p>\n<p>R2(config)#no ip route 200.1.16.0 255.255.252.0 null 0<br \/>\nR2(config)#router bgp 2<br \/>\nR2(config-router)#no network 200.1.16.0 mask 255.255.252.0<\/p>\n<p>\u9700\u8981\u5148\u5c06\u660e\u7ec6\u8def\u7531\u901a\u544a\u8fdbBGP\uff1a<\/p>\n<p>R2(config)#router bgp 2<br \/>\nR2(config-router)#network 200.1.16.0<br \/>\nR2(config-router)#network 200.1.17.0<br \/>\nR2(config-router)#network 200.1.18.0<br \/>\nR2(config-router)#network 200.1.19.0<\/p>\n<p><span style=\"color: #ff0000;\">\u4e0d\u5e26mask\u53c2\u6570\uff0c\u9ed8\u8ba4\u4e3a\u7f51\u7edc\u53f7\u7684\u4e3b\u7c7b\u5b50\u7f51\u63a9\u7801<\/span><\/p>\n<p>\u4f7f\u7528aggregate-address\u5ba3\u544a\u805a\u5408\u8def\u7531\uff1a<\/p>\n<p>R2(config)#router bgp 2<br \/>\n<span style=\"color: #ff0000;\">R2(config-router)#aggregate-address 200.1.16.0 255.255.252.0 summary-only<\/span><\/p>\n<p><span style=\"color: #ff0000;\">summary-only\u53c2\u6570\u8868\u793a\u53ea\u5ba3\u544a\u805a\u5408\u8def\u7531\uff0c\u6291\u5236\u660e\u7ec6\u8def\u7531<\/span><\/p>\n<p>\u5728R2\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff0c\u660e\u7ec6\u8def\u7531\u88ab\u6291\u5236\uff1a<\/p>\n<p>R2#sh ip bgp<br \/>\nBGP table version is 12, local router ID is 2.2.2.2<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\ns&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\ns&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\ns&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\ns&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<\/p>\n<p>\u5728R1\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff0c\u53ea\u6709\u4e00\u6761\u805a\u5408\u8def\u7531\uff1a<\/p>\n<p>R1#sh ip bgp<br \/>\nBGP table version is 4, local router ID is 1.1.1.1<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\n*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<\/p>\n<p><span style=\"color: #0000ff;\">5\u3001\u4fdd\u7559\u660e\u7ec6\u8def\u7531\uff0c\u6e05\u9664R2\u4e0a\u7684\u805a\u5408\u8def\u7531\u914d\u7f6e\uff0c\u5728R1\u4e0a\u4f7f\u7528BGP\u8def\u7531\u805a\u5408\u547d\u4ee4aggregate-address\u5b9e\u73b0BGP\u8def\u7531\u805a\u5408<\/span><\/p>\n<p>R2(config)#router bgp 2<br \/>\nR2(config-router)#no aggregate-address 200.1.16.0 255.255.252.0 summary-only<\/p>\n<p>\u5728R1\u4e0a\u6267\u884c\u8def\u7531\u6c47\u603b\u547d\u4ee4\uff1a<\/p>\n<p>R1(config)#router bgp 1<br \/>\nR1(config-router)#aggregate-address 200.1.16.0 255.255.252.0 summary-only<\/p>\n<p>\u5728R1\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff1a<\/p>\n<p>R1#sh ip bgp<br \/>\nBGP table version is 14, local router ID is 1.1.1.1<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\ns&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\n<span style=\"color: #ff0000;\">*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<\/span><br \/>\ns&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<\/p>\n<p>\u5728R2\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff1a<\/p>\n<p>R2#sh ip bgp<br \/>\nBGP table version is 18, local router ID is 2.2.2.2<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\n*&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n<span style=\"color: #ff0000;\">*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 12.0.0.1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 1 i<\/span><br \/>\n*&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<\/p>\n<p><span style=\"color: #ff0000;\">\u95ee\u9898\uff1aR1\u7684\u6c47\u603b\u8def\u7531Path\u5c5e\u6027\u4e3a\u7a7a\uff0c\u7531\u4e8eEBGP\u7684\u6c34\u5e73\u5206\u5272\u662f\u57fa\u4e8ePath\u5c5e\u6027\u7684\uff0c\u56e0\u6b64\u8be5\u8def\u7531\u6761\u76ee\u4e0d\u6ee1\u8db3\u6c34\u5e73\u5206\u5272\uff0c\u5c06\u4f1a\u56de\u4f20\u7ed9R2\uff0c\u6240\u4ee5\u5728R2\u4e0a\u53ef\u4ee5\u770b\u5230Next Hop\u503c\u4e3aR1\u7684\u6c47\u603b\u8def\u7531\u3002\u5982\u679c\u660e\u7ec6\u8def\u7531\u4e2d\u7684\u67d0\u4e00\u6761down\u6389\uff0c\u5c06\u6709\u53ef\u80fd\u5bfc\u81f4\u4e00\u4e9b\u5e26\u5bbd\u6d41\u91cf\u7684\u6d6a\u8d39\u3002\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5728aggregate-address\u547d\u4ee4\u540e\u52a0\u591a\u53e6\u5916\u4e00\u4e2a\u53c2\u6570as-set\uff0c\u8fd9\u4e2a\u53c2\u6570\u4f1a\u5c06\u660e\u7ec6\u8def\u7531\u4e2d\u7684\u4e00\u4e9b\u5c5e\u6027\u4fdd\u7559\u7ed9\u6c47\u603b\u8def\u7531\uff0c\u5176\u4e2d\u5305\u62ec\u4e86as-path\u5c5e\u6027\u3002<\/span><\/p>\n<p>R1(config)#router bgp 1<br \/>\nR1(config-router)#no aggregate-address 200.1.16.0 255.255.252.0 summary-only<br \/>\n<span style=\"color: #ff0000;\">R1(config-router)#aggregate-address 200.1.16.0 255.255.252.0 summary-only as-set<\/span><\/p>\n<p>\u91cd\u65b0\u5728R1\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff1a<\/p>\n<p>R1#sh ip bgp<br \/>\nBGP table version is 20, local router ID is 1.1.1.1<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\ns&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\n<span style=\"color: #ff0000;\">*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100\u00a0 32768 2 i<\/span><br \/>\ns&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<\/p>\n<p>\u91cd\u65b0\u5728R2\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff1a<\/p>\n<p>R2#sh ip bgp<br \/>\nBGP table version is 19, local router ID is 2.2.2.2<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\n*&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<br \/>\n*&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 32768 i<\/p>\n<p><span style=\"color: #ff0000;\">EBGP\u6c34\u5e73\u5206\u5272\u8d77\u4f5c\u7528\u4e86\uff0cR2\u4e0a\u4e0d\u4f1a\u51fa\u73b0\u56de\u4f20\u7684\u805a\u5408\u8def\u7531<\/span><\/p>\n<p><span style=\"color: #0000ff;\">6\u3001\u6e05\u9664R1\u4e0a\u7684\u805a\u5408\u8def\u7531\u914d\u7f6e\uff0c\u7ed3\u5408\u4f7f\u7528suppress-map\u5b9e\u73b0\u90e8\u5206BGP\u8def\u7531\u805a\u5408\u3002\u9700\u6c42\u4e3a\u6291\u5236200.1.18.0\/24\u548c200.1.19.0\/24\u7f51\u6bb5\uff0c\u5176\u4ed6\u7f51\u6bb5\u53ca\u805a\u5408\u8def\u7531\u663e\u793a\u3002<\/span><\/p>\n<p>R1(config)#router bgp 1<br \/>\nR1(config-router)#no aggregate-address 200.1.16.0 255.255.252.0 summary-only as-set<\/p>\n<p>\u4f7f\u7528\u524d\u7f00\u5217\u8868\u6293\u53d6\u8def\u7531\u6761\u76ee\uff1a<\/p>\n<p><span style=\"color: #ff0000;\">R1(config)#ip prefix-list 10 permit 200.1.18.0\/23 ge 24 le 24<\/span><\/p>\n<p>\u521b\u5efaroute-map\u5904\u7406\u8def\u7531\u6761\u76ee<\/p>\n<p><span style=\"color: #ff0000;\">R1(config)#route-map SU permit 10<\/span><br \/>\n<span style=\"color: #ff0000;\">R1(config-route-map)#match ip address prefix-list 10 <\/span><br \/>\nR1(config-route-map)#exit<\/p>\n<p>\u4f7f\u7528suppress-map\u521b\u5efa\u805a\u5408\u8def\u7531<\/p>\n<p>R1(config)#router bgp 1<br \/>\n<span style=\"color: #ff0000;\">R1(config-router)#aggregate-address 200.1.16.0 255.255.252.0 suppress-map SU as-set<\/span><\/p>\n<p>\u786c\u6e05\u9664BGP\u8def\u7531\u8868<\/p>\n<p>R1#clear ip bgp *<\/p>\n<p>\u5728R1\u4e0a\u67e5\u770bBGP\u8def\u7531\u8868\uff1a<\/p>\n<p>R1#sh ip bgp<br \/>\nBGP table version is 8, local router ID is 1.1.1.1<br \/>\nNetwork\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Next Hop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Metric LocPrf Weight Path<br \/>\n*&gt; 200.1.16.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\n*&gt; 200.1.16.0\/22\u00a0\u00a0\u00a0 0.0.0.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 100\u00a0 32768 2 i<br \/>\n*&gt; 200.1.17.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.18.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<br \/>\ns&gt; 200.1.19.0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12.0.0.2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 2 i<\/p>\n<p><span style=\"color: #ff0000;\">\u53ef\u4ee5\u53d1\u73b018\u300119\u4e24\u4e2a\u7f51\u6bb5\u88ab\u6291\u5236\uff0c\u5176\u4f59\u7f51\u6bb5best<\/span><\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"http:\/\/www.slyar.com\/blog\">Slyar Home<\/a> &raquo; <a href=\"http:\/\/www.slyar.com\/blog\/ccnp-labs-bgp-aggregate-basic.html\">CCNP\u5b9e\u9a8c:BGP\u8def\u7531\u805a\u5408\u57fa\u7840<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a\u59dc\u5357(Slyar) \u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (www.slyar.com) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002 \u3010\u5b9e\u9a8c\u73af\u5883\u3011 C3640-IK9O3S-M Version 12.4(10) \u3010\u5b9e\u9a8c\u76ee\u7684\u3011 \u9a8c\u8bc1BGP\u7684\u8def\u7531\u805a\u5408 \u3010\u5b9e\u9a8c\u62d3\u6251\u3011 \u3010\u5b9e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1104],"tags":[300,912],"class_list":["post-1576","post","type-post","status-publish","format-standard","hentry","category-computer-networks","tag-300","tag-912"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"CCNP\u5b9e\u9a8c:BGP\u8def\u7531\u805a\u5408\u57fa\u7840\uff0c\u5b9e\u9a8c\u5206\u522b\u5728\u76ee\u7684\u8def\u7531\u5668\u548c\u6e90\u8def\u7531\u5668\u4e0a\u8fdb\u884c\u8def\u7531\u805a\u5408\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Slyar\"\/>\n\t<meta name=\"keywords\" content=\"slyar,ccnp,bgp,cisco,aggregate,\u8def\u7531\u805a\u5408,\u805a\u5408,\u5c5e\u6027,path,as-path,\u4e0b\u4e00\u8df3\" \/>\n\t<link rel=\"canonical\" href=\"http:\/\/www.slyar.com\/blog\/ccnp-labs-bgp-aggregate-basic.html\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"zh_CN\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Slyar Home | \u8bb0\u5f55\u4e2a\u4eba\u751f\u6d3b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"CCNP\u5b9e\u9a8c:BGP\u8def\u7531\u805a\u5408\u57fa\u7840 - Slyar Home\" \/>\n\t\t<meta property=\"og:description\" content=\"CCNP\u5b9e\u9a8c:BGP\u8def\u7531\u805a\u5408\u57fa\u7840\uff0c\u5b9e\u9a8c\u5206\u522b\u5728\u76ee\u7684\u8def\u7531\u5668\u548c\u6e90\u8def\u7531\u5668\u4e0a\u8fdb\u884c\u8def\u7531\u805a\u5408\" \/>\n\t\t<meta property=\"og:url\" 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