v5 Written:
\n2.1.e Implement and troubleshoot EtherChannel
\n2.1.e [i] LACP PAgP, manual
\n2.1.e [ii] Layer 2, Layer 3
\n2.1.e [iii] Load-balancing
\n2.1.e [iv] Etherchannel misconfiguration guard<\/p>\n
v5 Lab:
\n1.1.e Implement and troubleshoot etherchannel
\n1.1.e [i] LACP, PAgP, manual
\n1.1.e [ii] layer 2, layer 3
\n1.1.e [iii] load-balancing
\n1.1.e [iv] etherchannel misconfiguration guard<\/p>\n
Documentation:<\/p>\n
Catalyst 3750-X and 3560-X Software Configuration Guide, Release 15.0(1)SE,
\nChapter 40: Configuring EtherChannels and Link-State Tracking, pgs. 40-1 to 40-25<\/p>\n
Books:<\/p>\n
CCIE Routing and Switching Exam Certification Guide 4th Ed; Chapter 3: Spanning Tree Protocol, PortChannels, pgs. 82 – 84, 98 – 99<\/p>\n
Cisco LAN Switching; Chapter 8: Trunking Technologies and Applications,
\nEtherChannel, pgs. 298 – 306<\/p>\n
INE:<\/p>\n
EtherChannel provides fault-tolerant high-speed links between switches, routers, and servers.
\n– used to increase bandwidth
\n– provides automatic recovery from the loss of a link
\n– consists of individual Gigabit Ethernet links bundled into a single logical link
\n– provides full-duplex bandwidth up to 8Gb\/s or 80Gb\/s
\n– consist of up to eight compatibly configured Ethernet ports
\n– layer 2 or layer 3
\n– the number of EtherChannels is limited to 48<\/p>\n
Layer 3 EtherChannels are not supported on switches running the LAN base feature set<\/p>\n
EtherChannel modes
\n– Port Aggregation Protocol (PAgP)
\n– Link Aggregation Protocol (LACP)
\n– On<\/p>\n
Each EtherChannel has a port-channel logical interface
\n– numbered 1 to 48
\n– with Layer 2 interfaces, the channel-group interface command dynamically creates the port-channel logical interface
\n– with Layer 3 interfaces, the logical interface must be created manually
\n– after configuring EtherChannel, any changes made to the logical interface is applied to all of the physical ports<\/p>\n
PAgP is a Cisco proprietary protocol
\n– DTP and CDP send and receive packets over the physical ports in the EtherChannel
\n– for Layer 2, the first port in the channel provides the MAC address for the EtherChannel
\n– for Layer 3, the switch allocates a MAC address when the logical interface is created
\n– trunk ports send and receive PAgP packets on the lowest numbered VLAN<\/p>\n
PAgP ports must all have the same configuration
\n– speed
\n– duplex
\n– VLAN
\n– native VLAN
\n– trunking status
\n– type<\/p>\n
PAgP adds the logical interface to spanning tree as a single interface<\/p>\n
PAgP modes
\n– auto
\n– desirable<\/p>\n
PAgP auto
\n– places port in a passive negotiating state
\n– port responds to PAgP packets
\n– does not start PAgP packet negotiation<\/p>\n
PAgP desirable
\n– places port into an active negotiating state
\n– starts negotiations with other ports<\/p>\n
LACP
\n– defined by IEEE 802.3ad
\n– DTP and CDP send and receive packets over the physical ports in the EtherChannel
\n– trunk ports send and receive LACP packets on the lowest numbered VLAN
\n– for Layer 2, the first port in the channel provides the MAC address for the EtherChannel
\n– for Layer 3, the switch allocates a MAC address when the logical interface is created<\/p>\n
LACP modes
\n– active
\n– passive<\/p>\n
LACP active
\n– places port into an active negotiating state
\n– start negotiations with other ports<\/p>\n
LACP passive
\n– places port in a passive negotiating state
\n– port responds to LACP packets
\n– does not start LACP packet negotiation<\/p>\n
EtherChannel On Mode
\n– used to manually configure an EtherChannel
\n– forces a port to join an EtherChannel without negotiations
\n– can be useful if the remote device does not support PAgP or LACP
\n– all ports must be configured the same
\n– if the EtherChannel group is misconfigured, packet loss or spanning tree loops can occur<\/p>\n
Load balancing
\n– dst-ip
\n– dst-mac
\n– src-dst-ip
\n– src-dst-mac
\n– src-ip
\n– src-mac<\/p>\n
Default EtherChannel configuration
\n– channel-groups: none assigned
\n– port-channel logical interface: none defined
\n– PAgP mode: no default
\n– PAgP learn method: aggregate-port learning on all ports
\n– LACP mode: no default
\n– LACP learn method: aggregate-port on all ports
\n– LACP port priority: 32768 on all ports
\n– LACP system priority: 32768
\n– LACP system ID: LACP system priority and the switch MAC address
\n– load-balancing: src-mac<\/p>\n
EtherChannel configuration guidelines
\n– if improperly configured, some EtherChannel ports are automatically disabled to avoid network loops or other problems
\n– no more than 48 EtherChannels
\n– up to 8 ports for PAgP
\n– up to 16 ports for LACP, 8 ports are active, 8 ports are in standby mode
\n– configure all ports for the same speed and duplex
\n– do not configure with a SPAN destination port
\n– do not configure with a secure port
\n– do not configure with a private VLAN
\n– do not configure with 802.1X
\n– do not enable link-state tracking<\/p>\n
conf t
\nint gi0\/1
\nswitchport mode { access | trunk }
\nswitchport access vlan
\nchannel-group mode {auto [non-silent]|desirable [non-silent]|on}|{active|passive}<\/p>\n
conf t
\nint po1
\nno switchport
\nip address
\nint gi0\/1
\nno switchport
\nno ip address
\nchannel-group mode {auto [non-silent]|desirable [non-silent]|on}|{active|passive}<\/p>\n
conf t
\nport-channel load-balance {dst-ip|dst-mac|src-dst-ip|src-dst-mac|src-ip|src-mac}<\/p>\n
show etherchannel load-balance
\nshow pagp internal
\nshow pagp counters
\nshow pagp neighbor
\nshow lacp sys-id
\nshow lacp counters
\nshow lacp internal
\nshow lacp neighbor
\nshow etherchannel detail
\nshow etherchannel summary<\/p>\n","protected":false},"excerpt":{"rendered":"
v5 Written: 2.1.e Implement and troubleshoot EtherChannel 2.1.e [i] LACP PAgP, manual 2.1.e [ii] Layer 2, Layer 3 2.1.e [iii] Load-balancing 2.1.e [iv] Etherchannel misconfiguration guard v5 Lab: 1.1.e Implement and troubleshoot etherchannel 1.1.e [i] LACP, PAgP, manual 1.1.e [ii] layer 2, layer 3 1.1.e [iii] load-balancing 1.1.e [iv] etherchannel misconfiguration guard Documentation: Catalyst 3750-X […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[30,16,11],"class_list":["post-74","post","type-post","status-publish","format-standard","hentry","category-ccie","tag-ccie","tag-etherchannel","tag-route-switch"],"_links":{"self":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/74","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=74"}],"version-history":[{"count":2,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/74\/revisions"}],"predecessor-version":[{"id":229,"href":"https:\/\/feralpacket.org\/index.php?rest_route=\/wp\/v2\/posts\/74\/revisions\/229"}],"wp:attachment":[{"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=74"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=74"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feralpacket.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=74"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}