LAG with RTAG7 Hashing
Overview
Traffic can be load balanced within an LACP trunk group and within an ECMP in a controlled manner using the RTAG7 hashing algorithm.
Topology
LACP with RTAG7 Configuration
Dynamic LAG with RTAG7
SW1
#configure terminal | Enter configure mode. |
(config)#bridge 1 protocol mstp | Configure bridge 1 as MSTP bridge. |
(config)#vlan 2-10 bridge 1 | Configure VLANS. |
(config)#load-balance rtag7 | Enable load-balance for rtag7 globally. |
(config)#load-balance rtag7 l2 src-mac dest-mac ether-type vlan | Enabling load-balance rtag7 for l2 with all options. |
(config)#load-balance rtag7 ipv4 dest-ipv4 src-ipv4 destl4-port srcl4-port protocol-id | Enabling load-balance rtag7 for ipv4 with all options. |
(config)#interface po1 | Enter into port channel interface po1. |
(config-if)#switchport | Configure po1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe1 interface. |
(config-if)#port-channel load-balance rtag7 | Enable rtag7 load-balancing method. |
(config-if)#exit | Exit the po1 interface mode. |
(config)#interface xe1 | Enter interface mode. |
(config-if)#switchport | Configure xe1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe1 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel |
(config-if)#exit | Exit the xe1 interface mode. |
(config)#interface xe2 | Enter interface mode. |
(config-if)#switchport | Configure xe2 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe2 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel.. |
(config-if)#exit | Exit the xe2 interface mode. |
(config)#interface xe3 | Enter interface mode. |
(config-if)#switchport | Configure xe3 as a layer 2 port . |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe3 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel. |
(config-if)#exit | Exit the xe3 interface mode. |
SW2
#configure terminal | Enter configure mode. |
(config)#bridge 1 protocol mstp | Configure bridge 1 as MSTP bridge. |
(config)#vlan 2-10 bridge 1 | Configure VLANS. |
(config)#interface po1 | Enter interface mode |
(config-if)#switchport | Configure po1 as a layer 2 port |
(config-if)#bridge-group 1 | Associate bridge to an interface |
(config-if)#switchport mode trunk | Configure port as a trunk |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the po1 interface |
(config-if)#exit | Exit the interface mode |
(config)#interface xe1 | Enter interface mode. |
(config-if)#switchport | Configure xe1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe1 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel. |
(config-if)#exit | Exit the xe1 interface mode. |
(config)#interface xe2 | Enter interface mode. |
(config-if)#switchport | Configure xe2 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe2 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel. |
(config-if)#exit | Exit the xe2 interface mode. |
(config)#interface xe3 | Enter interface mode. |
(config-if)#switchport | Configure xe3 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe3 interface. |
(config-if)#channel-group 1 mode active | Make port as part of port channel. |
Validation
SW1#show etherchannel summary
Aggregator po1 100010
Aggregator Type: Layer2
Admin Key: 0010 - Oper Key 0010
Link: xe1 (5061) sync: 1
Link: xe2 (5062) sync: 1
Link: xe3 (5063) sync: 1
SW2#show etherchannel summary
Aggregator po1 7
Aggregator Type: Layer2
Admin Key: 0010 - Oper Key 0010
Link: xe1 (5013) sync: 1
Link: xe2 (5014) sync: 1
Link: xe3 (5015) sync: 1
SW1#show etherchannel detail
Aggregator po1 100001
Aggregator Type: Layer2
Mac address: 3c:2c:99:28:52:1e
Admin Key: 0001 - Oper Key 0001
Actor LAG ID- 0x8000,3c-2c-99-7a-b2-e0,0x0001
Receive link count: 3 - Transmit link count: 3
Individual: 0 - Ready: 1
Partner LAG ID- 0x8000,00-18-23-30-20-ce,0x0001
Link: xe1 (5061) sync: 1
Link: xe2 (5062) sync: 1
Link: xe3 (5063) sync: 1
Collector max delay: 5
Static LAG with RTAG7
SW1
#configure terminal | Enter configure mode. |
(config)#bridge 1 protocol mstp | Configure bridge 1 as MSTP bridge. |
(config)#vlan 2-10 bridge 1 | Configure VLANS |
(config)#load-balance rtag7 | Enable load-balance for rtag7 globally. |
(config)#load-balance rtag7 l2 src-mac dest-mac ether-type vlan | Enabling load-balance rtag7 for l2 with all options. |
(config)#load-balance rtag7 ipv4 dest-ipv4 src-ipv4 destl4-port srcl4-port protocol-id | Enabling load-balance rtag7 for ipv4 with all options . |
(config)#interface sa1 | Enter into port channel interface sa1. |
(config-if)#switchport | Configuresa1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the sa1 interface. |
(config-if)#port-channel load-balance rtag7 | Enable rtag7 load-balancing method. |
(config)#interface xe1 | Enter interface mode. |
(config-if)#switchport | Configure xe1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe1 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe1 interface mode. |
(config)#interface xe2 | Enter interface mode. |
(config-if)#switchport | Configure xe2 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe2 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe2 interface mode. |
(config)#interface xe3 | Enter interface mode. |
(config-if)#switchport | Configure xe3 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe3 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe3 interface mode. |
SW2
#configure terminal | Enter configure mode. |
(config)#bridge 1 protocol mstp | Configure bridge 1 as MSTP bridge. |
(config)#vlan 2-10 bridge 1 | Configure VLANS. |
(config)#interface sa1 | Enter interface mode |
(config-if)#switchport | Configure sa1 as a layer 2 port |
(config-if)#bridge-group 1 | Associate bridge to an interface |
(config-if)#switchport mode trunk | Configure port as a trunk |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the sa1 interface. |
(config-if)#exit | Exit interface mode |
(config)#interface xe1 | Enter interface mode. |
(config-if)#switchport | Configure xe1 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe1 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe1 interface mode. |
(config)#interface xe2 | Enter interface mode. |
(config-if)#switchport | Configure xe2 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe2 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe2 interface mode. |
(config)#interface xe3 | Enter interface mode. |
(config-if)#switchport | Configure xe3 as a layer 2 port. |
(config-if)#bridge-group 1 | Associate bridge to an interface. |
(config-if)#switchport mode trunk | Configure port as a trunk. |
(config-if)#switchport trunk allowed vlan all | Allow all the VLANs on the xe3 interface. |
(config-if)#static-channel-group 1 | Make port as part of Static port channel. |
(config-if)#exit | Exit the xe3 interface mode. |
Validation
SW1#show static-channel-group
Static Aggregator: sa1
Member Status
xe1 up
xe2 up
xe3 up
SW1#
#show running-config interface sa1
!
interface sa1
load-interval 30
ip address 14.4.1.2/24
mtu 1600
port-channel load-balance rtag7
port-channel min-links 4
ip ospf network point-to-point
ip ospf cost 1000