{"id":844,"date":"2021-08-20T03:08:24","date_gmt":"2021-08-20T03:08:24","guid":{"rendered":"http:\/\/feralpacket.org\/?p=844"},"modified":"2021-08-20T03:08:24","modified_gmt":"2021-08-20T03:08:24","slug":"etherchannel-notes","status":"publish","type":"post","link":"https:\/\/feralpacket.org\/?p=844","title":{"rendered":"Etherchannel Notes"},"content":{"rendered":"

Etherchannel<\/span><\/p>\n

 – It\u2019s an interfaced bundling technology<\/p>\n

 – Used to group up to 8 (2 to 8) similar interfaces<\/p>\n

     -> Must have same properties<\/p>\n

          -> Speed<\/p>\n

          -> Duplex<\/p>\n

          -> Interface mode<\/p>\n

               -> Access<\/p>\n

               -> Trunk<\/p>\n

          -> VLAN-ID (for access ports)<\/p>\n

 – Protocols can be used to configure the etherchannel<\/p>\n

     -> Port Aggregation Protocol (PAgP)<\/p>\n

          -> Master – desirable<\/p>\n

          -> Slave – auto<\/p>\n

     -> Link Aggregation Control Protocol (LACP)<\/p>\n

          -> 802.1ad<\/p>\n

          -> Can have up to 8 backup interfaces<\/p>\n

          -> Master – active<\/p>\n

          -> Slave – passive<\/p>\n

     -> Manual etherchannel configuration<\/p>\n

          -> only keyword is \u201con”<\/p>\n

<\/p>\n

SW1(config)# int range fa0\/1 – 2<\/span><\/p>\n

 channel group 5 mode { desirable | auto | active | passive | on }<\/span><\/p>\n

show etherchannel sum<\/p>\n

     Po1     SU     Fa0\/1(P), Fa0\/2(P)<\/p>\n

L3 Ehterchannel<\/span><\/p>\n

SW1(config)# int range fa0\/1 – 2<\/span><\/p>\n

 no switchport<\/span><\/p>\n

 – \u201cno switchport\u201d must be configured before the channel-group configuration<\/p>\n

LACP<\/span><\/p>\n

 – Uses concept of Master \/ Slave to decide negotiator<\/p>\n

 – Master is elected according to lower priority<\/p>\n

     -> Default system priority – 32768<\/p>\n

     -> Then lowest MAC address<\/p>\n

     -> Lowest Port-ID used first<\/p>\n

 – Negotiator (Master) determines which ports are used<\/p>\n

     -> Other ports become backup ports (if more than 8 are configured)<\/p>\n

<\/p>\n

SW1(config)# lacp system-priority 100<\/p>\n

Once master is elected, port-priority can be used to decide which ports are used<\/p>\n

 – Lower is better (default is 32768)<\/p>\n

SW1(config)# int range fa0\/9 – 16<\/span><\/p>\n

 lacp port-priority 100<\/span><\/p>\n

Load Balancing Mechanism<\/span><\/p>\n

 – 9 algorithms are available to decide exit interface<\/p>\n

 – Only 1 algorithm can be configured<\/p>\n

 – Sending side affected only<\/p>\n

 – Single input<\/p>\n

     -> src-ip<\/p>\n

     -> dst-ip<\/p>\n

     -> src-mac<\/p>\n

     -> dst-mac<\/p>\n

     -> src-port<\/p>\n

     -> dst-port<\/p>\n

 – Dual input<\/p>\n

     -> src-dst-ip<\/p>\n

     -> src-dst-mac<\/p>\n

     -> src-dst-port<\/p>\n

src-dst-ip<\/p>\n

 – Source IP:  10.0.0.1 (0000 0001)<\/p>\n

 – Source IP:  10.0.0.2 (0000 0010)<\/p>\n

 – Destination IP:  10.0.0.5 (0000 0101)<\/p>\n

 – 2 links<\/p>\n

     -> last bit<\/p>\n

 – 3 to 4 links<\/p>\n

     -> last 2 bits<\/p>\n

 – 5 – 8 links<\/p>\n

     -> last 3 bits<\/p>\n

<\/p>\n

XOR used for dual input algorithms<\/p>\n

SW1(config)# port-channel load-balance { src-ip | dst-ip | src-mac | dst-mac | src-port | dst-port | src-dst-ip | src-dst-mac | src-dst-port }<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Etherchannel<\/p>\n","protected":false},"author":1,"featured_media":841,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[16,63,62,31],"class_list":["post-844","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-etherchannel","tag-lacp","tag-pagp","tag-published"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=844"}],"version-history":[{"count":1,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/844\/revisions"}],"predecessor-version":[{"id":969,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/844\/revisions\/969"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/media\/841"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}