{"id":89,"date":"2020-07-18T12:57:32","date_gmt":"2020-07-18T03:57:32","guid":{"rendered":"http:\/\/192.168.20.1\/?p=89"},"modified":"2021-04-30T17:39:42","modified_gmt":"2021-04-30T08:39:42","slug":"cisco-flex-link-dummy-multicast-packet-mac-address-aging-time","status":"publish","type":"post","link":"https:\/\/rlab.cavtime.net\/?p=89","title":{"rendered":"Cisco Flex Link Dummy Multicast Packet MAC address aging time"},"content":{"rendered":"<h2>Overview<\/h2>\n<p>Cisco Flex Link \u306e Dummy Multicast Packet \u306e MAC address \u306e aging time \u304c\u77ed\u3044\u73fe\u8c61\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u3059\u308b\u3002<\/p>\n<h2>Network Diagram<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"img-responsive right-block\" src=\"https:\/\/rlab.cavtime.net\/wp-content\/uploads\/2021\/04\/Cisco_FliexLink_Basic.png\" alt=\"\" width=\"801\" height=\"321\" \/><\/p>\n<h2>Reference<\/h2>\n<ul>\n<li><a href=\"https:\/\/rlab.cavtime.net\/?p=92\">Cisco FlexLink<\/a><\/li>\n<\/ul>\n<h2>Summary<\/h2>\n<p><a href=\"https:\/\/rlab.cavtime.net\/?p=92\" target=\"_blank\" rel=\"noopener noreferrer\">Cisco FlexLink<\/a>\u00a0\u3067\u78ba\u8a8d\u3055\u308c\u305f Flex Link \u306e Dummy Multicast Packet \u3092\u53d7\u4fe1\u3057\u305f Cisco L2 Switch \u3067 MAC Address Table \u306e aging time \u304c15\u79d2\u7a0b\u5ea6\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f\u3002<\/p>\n<h2>Environment<\/h2>\n<h3>SW01 \/ SW02<\/h3>\n<pre>Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 15.2(2)E9, RELEASE SOFTWARE (fc4)\r\nTechnical Support: http:\/\/www.cisco.com\/techsupport\r\nCopyright (c) 1986-2018 by Cisco Systems, Inc.\r\nCompiled Sat 08-Sep-18 14:56 by prod_rel_team\r\n\r\nROM: Bootstrap program is C2960S board boot loader\r\nBOOTLDR: C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(55r)SE, RELEASE SOFTWARE (fc1)\r\n<\/pre>\n<h3>SW03 \/ SW04<\/h3>\n<pre>Cisco IOS Software, C3750 Software (C3750-IPSERVICES-M), Version 12.2(35)SE2, RELEASE SOFTWARE (fc1)\r\nCopyright (c) 1986-2007 by Cisco Systems, Inc.\r\nCompiled Tue 06-Feb-07 01:27 by antonino\r\nImage text-base: 0x00003000, data-base: 0x01240AEC\r\n\r\nROM: Bootstrap program is C3750 boot loader\r\nBOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, RELEASE SOFTWARE (fc1)\r\n<\/pre>\n<h3>PC<\/h3>\n<pre>$ cat \/etc\/os-release\r\nNAME=\"Ubuntu\"\r\nVERSION=\"18.04.4 LTS (Bionic Beaver)\"\r\nID=ubuntu\r\nID_LIKE=debian\r\nPRETTY_NAME=\"Ubuntu 18.04.4 LTS\"\r\nVERSION_ID=\"18.04\"\r\nHOME_URL=\"https:\/\/www.ubuntu.com\/\"\r\nSUPPORT_URL=\"https:\/\/help.ubuntu.com\/\"\r\nBUG_REPORT_URL=\"https:\/\/bugs.launchpad.net\/ubuntu\/\"\r\nPRIVACY_POLICY_URL=\"https:\/\/www.ubuntu.com\/legal\/terms-and-policies\/privacy-policy\"\r\nVERSION_CODENAME=bionic\r\nUBUNTU_CODENAME=bionic\r\n$ \r\n<\/pre>\n<h2>Configuration<\/h2>\n<h3>SW01<\/h3>\n<pre>!\r\ninterface GigabitEthernet1\/0\/1\r\n switchport backup interface Gi1\/0\/2\r\n switchport backup interface Gi1\/0\/2 preemption mode forced\r\n!\r\ninterface GigabitEthernet1\/0\/2\r\n!\r\ninterface GigabitEthernet1\/0\/24\r\n switchport access vlan 2\r\n!\r\ninterface Vlan2\r\n ip address 192.168.202.1 255.255.255.0\r\n!\r\nip default-gateway 192.168.202.254\r\n!\r\nntp server 192.168.1.10\r\n!\r\n<\/pre>\n<h3>SW02<\/h3>\n<pre>!\r\ninterface GigabitEthernet1\/0\/1\r\n!\r\ninterface GigabitEthernet1\/0\/2\r\n!\r\ninterface GigabitEthernet1\/0\/24\r\n switchport access vlan 2\r\n!\r\ninterface Vlan2\r\n ip address 192.168.202.2 255.255.255.0\r\n!\r\nip default-gateway 192.168.202.254\r\n!\r\nntp server 192.168.1.10\r\n!\r\n<\/pre>\n<h3>SW03 \/ SW04<\/h3>\n<pre>!\r\ninterface GigabitEthernet1\/0\/1\r\n!\r\ninterface GigabitEthernet1\/0\/2\r\n!\r\n<\/pre>\n<h3>MAC Address<\/h3>\n<ul>\n<li>f0de.f12e.f993 : PC NIC<\/li>\n<\/ul>\n<h2>Methods<\/h2>\n<p><a href=\"https:\/\/rlab.cavtime.net\/?p=92\" target=\"_blank\" rel=\"noopener\">Cisco FlexLink<\/a>\u00a0\u3067\u78ba\u8a8d\u3055\u308c\u305f\u73fe\u8c61\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b<\/p>\n<ul>\n<li>PC : \u7121\u901a\u4fe1\u72b6\u614b\u306b\u3059\u308b<\/li>\n<li>SW02 : PC \u306e MAC Address \u3092\u524a\u9664\u3059\u308b<\/li>\n<li>SW01 : Interface GigabitEthernet1\/0\/1 \u306e\u30b1\u30fc\u30d6\u30eb\u3092\u629c\u304f<\/li>\n<li>SW02 : PC NIC \u3068 SW01 interface vlan 1 \u306e MAC Address \u306e forwarding port \u304c\u5207\u308a\u66ff\u308f\u3063\u3066\u3044\u308b\u3053\u3068\u3092 show mac address-table dynamic command \u3067\u78ba\u8a8d\u3059\u308b<\/li>\n<\/ul>\n<p>\u3067\u3042\u308b\u3002<\/p>\n<h2>Test<\/h2>\n<h3>SW01 : Link down<\/h3>\n<pre>sw01#\r\nJul 18 12:53:58.477 JST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1\/0\/1, changed state to down\r\nJul 18 12:53:59.478 JST: %LINK-3-UPDOWN: Interface GigabitEthernet1\/0\/1, changed state to down\r\nsw01#\r\n<\/pre>\n<h3>SW02 : mac address-table state<\/h3>\n<pre>sw02#\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 6%\/0%; one minute: 7%; five minutes: 6%\r\nTime source is NTP, 12:53:54.887 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\n   1    f0de.f12e.f993    DYNAMIC     Gi1\/0\/1 &lt;----- PC MAC Address\r\nTotal Mac Addresses for this criterion: 5\r\nsw02#\r\nsw02#clear mac address-table dynamic\r\nsw02#\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 5%\/0%; one minute: 7%; five minutes: 6%\r\nTime source is NTP, 12:53:57.383 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\nTotal Mac Addresses for this criterion: 3\r\nsw02#\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 5%\/0%; one minute: 7%; five minutes: 6%\r\nTime source is NTP, 12:53:57.886 JST Sat Jul 18 2020 &lt;----- Link down \/ Dummy Multicast Address\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\n   1    c07b.bcbb.fcc0    DYNAMIC     Gi1\/0\/2\r\n   1    f0de.f12e.f993    DYNAMIC     Gi1\/0\/2 &lt;----- PC MAC Address\r\nTotal Mac Addresses for this criterion: 6\r\n\r\n\u4e2d\u7565\r\n\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 12%\/0%; one minute: 8%; five minutes: 7%\r\nTime source is NTP, 12:54:12.897 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\n   1    c07b.bcbb.fcc0    DYNAMIC     Gi1\/0\/2\r\n   1    f0de.f12e.f993    DYNAMIC     Gi1\/0\/2 &lt;----- PC MAC Address\r\nTotal Mac Addresses for this criterion: 6\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 12%\/0%; one minute: 8%; five minutes: 7%\r\nTime source is NTP, 12:54:13.390 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\nTotal Mac Addresses for this criterion: 4\r\n\r\n\u4e2d\u7565\r\n\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 10%\/0%; one minute: 8%; five minutes: 7%\r\nTime source is NTP, 12:54:33.429 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\nTotal Mac Addresses for this criterion: 4\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 10%\/0%; one minute: 8%; five minutes: 7%\r\nTime source is NTP, 12:54:33.943 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\n   1    f0de.f12e.f993    DYNAMIC     Gi1\/0\/2 &lt;----- PC MAC Address\r\nTotal Mac Addresses for this criterion: 5\r\n\r\n\u4e2d\u7565\r\n\r\nsw02#show mac address-table dynamic\r\nLoad for five secs: 10%\/0%; one minute: 9%; five minutes: 7%\r\nTime source is NTP, 12:54:45.456 JST Sat Jul 18 2020\r\n          Mac Address Table\r\n-------------------------------------------\r\n\r\nVlan    Mac Address       Type        Ports\r\n----    -----------       --------    -----\r\n   2    c89c.1d24.2ae2    DYNAMIC     Gi1\/0\/24\r\n   2    c89c.1d24.2ae5    DYNAMIC     Gi1\/0\/24\r\n   1    001b.5455.e902    DYNAMIC     Gi1\/0\/1\r\n   1    0023.5dbd.4d82    DYNAMIC     Gi1\/0\/2\r\n   1    f0de.f12e.f993    DYNAMIC     Gi1\/0\/2 &lt;----- PC MAC Address\r\nTotal Mac Addresses for this criterion: 5\r\nsw02#\r\n<\/pre>\n<h2>Result<\/h2>\n<h3>\u52d5\u4f5c\u72b6\u6cc1<\/h3>\n<p>SW01 \/ SW02 \u306e\u305d\u308c\u305e\u308c\u306e\u52d5\u4f5c\u306e\u6642\u9593\u3092\u62bd\u51fa\u3059\u308b\u3068<\/p>\n<ol>\n<li>12:53:58.477 :\u00a0<strong>SW01<\/strong>\u00a0Protocol down message<\/li>\n<li>12:53:57.886 : PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<li>12:54:12.897 : PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<li>12:54:13.390 : not PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<li>12:54:33.429 : not PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<li>12:54:33.943 : PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<li>12:54:45.456 : PC MAC Address on\u00a0<strong>SW02<\/strong>\u00a0mac address-table<\/li>\n<\/ol>\n<p>\u3068\u3044\u3046\u72b6\u614b\u3067\u3042\u308b\u3002<\/p>\n<h3>\u72b6\u6cc1\u78ba\u8a8d<\/h3>\n<p>No.1 \u3068 No.2 \u306f\u6642\u9593\u7684\u306b\u9006\u8ee2\u3057\u3066\u3044\u308b\u304c\u3001\u307b\u307c\u540c\u6642\u3068\u8003\u3048\u3066\u3088\u3044\u3060\u308d\u3046\u3002\u4e00\u5fdc SW01 \/ SW02 \u306f NTP Server \u3068\u6642\u523b\u540c\u671f\u3092\u3057\u3066\u3044\u308b\u3002<\/p>\n<p>No.2 \u3067 SW01 \u304b\u3089 Flex Link \u306e Dummy Multicast Address \u3092\u53d7\u4fe1\u3057 PC \u306e MAC Address \u304c SW02 \u306e mac address-table \u306b\u767b\u9332<\/p>\n<p>No.2 \u301c No.3 \u306e\u6642\u9593 PC \u306e MAC Address \u304c SW02 \u306e mac address-table \u3055\u308c\u3066\u3044\u305f\u6642\u9593\u306f\u7d0415\u79d2\uff080:00:15.011)<\/p>\n<p>No.4 \u3067 PC \u306e MAC Address \u304c SW02 \u306e mac address-table \u304b\u3089\u524a\u9664\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f\u6642\u9593<\/p>\n<p>No.6 \u3067 PC \u304b\u3089\u306e\u4f55\u3089\u304b\u306e Packet \u3067 SW02 \u306e mac address-table \u306b PC \u306e MAC Address \u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f\u6642\u9593<\/p>\n<h3>\u7d50\u679c<\/h3>\n<p>\u7121\u901a\u4fe1\u72b6\u614b\u306e\u5834\u5408 Flex Link \u3067\u9001\u51fa\u3055\u308c\u308b Dummy Multicast Packet \u306f SW02 \u3067\u306e mac address-table \u306e\u4fdd\u6301\u6642\u9593\u306f 15\u79d2 \u7a0b\u5ea6\u3067\u3042\u3063\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Cisco Flex Link \u306e Dummy Multicast Packet \u306e MAC address \u306e aging time \u304c\u77ed\u3044\u73fe\u8c61\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u3059\u308b\u3002 Network Diagram Re [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118,102],"tags":[],"class_list":["post-89","post","type-post","status-publish","format-standard","hentry","category-ethernet","category-switch"],"_links":{"self":[{"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/posts\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=89"}],"version-history":[{"count":3,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions"}],"predecessor-version":[{"id":97,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions\/97"}],"wp:attachment":[{"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rlab.cavtime.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}