What's the best way to create redundency when there are two ASR1002 chassis? Single ISP link with WAN/Internet connection at this time. So, the question really is what's the best way to configure two ASRs when there's a single ISP link and when there's two active/active WAN/Internet circuts/links?
Thanks in advance.
To achieve full redundancy between the two ASRs is mainly to have two internet connections then configure an IP SLA pinging a known IP address such as 18.104.22.168 or 22.214.171.124
Then you want to configure HSRP, VRRP, or GLBP...
For HSRP it goes:
standby (group number between 0 and 255) ip (ip address of default gateway within subnet)
standby (group number) preempt delay minimum 10 (for a minimum of 10 seconds down time, or fine tune it to suit how long you expect to be down)
standby (group number) track 1
Someone else can fill in the commands for VRRP and GLBP.
So, there is no redundancy or fail-over mechanism to enable or create so when one of the ASRs fails the standby takes over, correct?
We do have two active/active Internet/WAN links from the same ISP. Each link is connected directly to an ASR( ISP --- ASR1 & ISP ---- ASR2). Each ASR is connected to a different downstream switch, which aren't configured with FHRP. Each switch is connected to an ASA, which are configured with fail-over. The topology simply looks something like this:
ASR1 ASR2 -- No physical connection between the two ASRs
SW1 -- SW2 -- Switches are physically connected. 802.1q. No FHRP
ASA1 -- ASA2 -- ASAs are physically connected and configured for FO
SW1 -- SW2 -- Switches are physically connected. 802.1q. HSRP configured
I am tasked to redesign this topology so it can provide best redundancy solution. Any ideas?
Thanks for the info.
The ISP is providing us with two Ethernet links. Each link is connected to a different ASR1002 and we have FHRP configured but no SLA, which I am working on. I think the ISP has the two Ethernet hand-offs terminate into a switch on their end so that's how we have HSRP configured on the two ASRs. By the way, I inherited this network just a month ago so I don't have all the info.
So, it seems that the current redundancy/HA solution is adequate except for the fact that the two Internet links are provisioned by the same ISP. Thoughts?
Going back to my original question. I was thinking of an Inter-chassis redundancy and came across this link: https://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/sbcu/2_xe/sbcu_2_xe_book/sbc_interHA.pdf