C9300-48P-E how to make active - standby

[sSiDs]

Good day team!

We have not a big office, so we've built CORE on c9300 switch.

Now we think about HA....if 1 switch goes down...second will handle all L3-L2 traffic

I could find info about which technologe to use.I wil be appreciate for any info or ponting me to link

[pman]

Hi,

can you elaborate a bit on your network topology today?

A little about what stacking is:

A switch stack always has one active switch and one standby switch. If the active switch becomes unavailable, the standby switch assumes the role of the active switch, and continues to the keep the stack operational.

The active switch controls the operation of the switch stack, and is the single point of stack-wide management.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-3/configuration_guide/stck_mgr_ha/b_173_stck_mgr_ha_9300_cg/managing_switch_stacks.html#concept_n21_z1c_b1b

[sSiDs]

ISR4351 with "router on the stick"  about 10 sub-interfaces scheme to c9300. 

also planning to buy second isr4351 and make a VRRP or HSRP.

So, there will be double port utilization, if both active and standby switches should be connected L2 to access switches...

i have read that i could not make a VSS on c9300...it a pitty. Reading attached file make me a little bit more clear abot high aviability.

[pman]

What is the throughput you expect to have in the network?
What kind of endpoints are there that are connected to 9300 (servers / clients / voip) and what protocols do they use?
Is VOIP also used?
Who is the upstream of the isr4351?

[sSiDs]

What is the throughput you expect to have in the network? - all access switches are C2960X-48FPD-L 

What kind of endpoints are there that are connected to 9300 (servers / clients / voip) - c2960x are connected to c9300  with LACP and several servers and what protocols do they use? Is VOIP also used? - yes, all kind of traffic.

Who is the upstream of the isr4351? - 2 ISPs 100 Mbit/s and 120 Mbit/s (400 mb throughput LIC activated)

[pman]

Hi,

I agree with @balaji.bandi with one router you do have a single point of failure.
On the subject of convergence time and VOIP  I have some suggestions:
1. use QOS to ensure that VoIP is not affected by congestion
2. examine your FHRP/Dynamic/static(if static use track/sla) convergence time to avoid the downtime as much as possible
3. I assume that if you purchase another router then each ISP will be connected to a different router?

[balaji.bandi]

How many Routers you have ?  as per the below message you have 1 Router with 2 Link please clarify ?

Who is the upstream of the isr4351? - 2 ISPs 100 Mbit/s and 120 Mbit/s (400 mb throughput LIC activated)

In this case you have single point of failure - if ISR fails, down the network even you build high availability it not going to achive full end to end high availability.

i have read that i could not make a VSS on c9300...it a pitty. Reading attached file make me a little bit more clear abot high aviability.

You can Make Cat 9300 as Stack, and you can use each switch uplink to different ports to the router.

In this case, if switch 1 Failes switch 2 still has a connectivity switch point of view.

Unfortunately, the end device still has only 1 connection, so that is a limitation, so that is universal Truth, so if any of the switches fails, the end device connection fails.

[sSiDs]

as a wrote - also planning to buy second isr4351 and make a VRRP or HSRP.

so there will be 2 - 4351 and 2-c9300

[balaji.bandi]

Applogies, i may have missed that bit, If you buying 2 Routers ,  You can connect 1 Router to switch 1, router 2 to Switch 2.

Couple things we need to make clarity, you want to run HSRP between Routers, and your switches act as Layer 2?

You like to use both the ISP at a time ?