Cisco And Redback Link Aggregation
Aggregating links is a normal task of any networker. Here’s how you can aggregate 4 links between a Redback SEOS and Cisco IOS device.
config t interface GigabitEthernet1/1 description Po1 - redback01:1/1 channel-group 1 mode on interface GigabitEthernet1/2 description Po1 - redback01:1/2 channel-group 1 mode on interface GigabitEthernet1/3 description Po1 - redback01:1/3 channel-group 1 mode on interface GigabitEthernet1/4 description Po1 - redback01:1/4 channel-group 1 mode on interface Port-channel1 description 4Gbps LAG redback01:lg-cisco01 ip address 192.168.1.2 255.255.255.254 end
The Redback configuration is a little bit different which makes more sense when you start to delve into the BNG or mutliple context options.
port 1/1 link-group lg-cisco01 no shut port 1/2 link-group lg-cisco01 no shut port 1/3 link-group lg-cisco01 no shut port 1/4 link-group lg-cisco01 no shut link-group lg-cisco01 description lg-cisco01:Po1 bind interface cisco01 local maximum-links 4 interface cisco01 description 4Gbps LAG cisco01:Po1 ip address 192.168.1.1/31
Trying to visualise the configuration hierarchy. The interface on a Redback ends up being a separate component when using a link-group.
Which method of configuration is better? The Cisco method has less moving parts and is going to be more familiar. The Redback way provides some additional flexibility which can be a double edge sword. If I had to pick, I’d choose the Cisco method but keep in mind there’s some pretty cool things you can do with the Redbacks.