L3 Switching: HSRP Configuration
Vložit
- čas přidán 13. 01. 2015
- Start learning cybersecurity with CBT Nuggets. courses.cbt.gg/security
In this video, Jeremy Cioara explains configuring HSRP: Cisco’s protocol for keeping your gateways fault-tolerant. Jeremy’s got four steps for configuring HSRP on your gateways - distribution-layer, internet-connected, or backup. With your gateways HSRP-configured, your routers will be backed up in the event of a failure.
The 300-115 SWITCH exam may be retired, but the information remains valuable for anyone who wants to learn intermediate-level networking skills. Understanding HSRP means knowing how and why an administrator should organize gateways into standby groups. It also means knowing how frequently gateways send a hello message, and how long it takes a neighbor to take over for a dead gateway after not receiving one. On top of all that, HSRP versions aren’t always uniform, and understanding which portion of the MAC address contains the HSRP version information can help ensure gateways stay in-communication. Get ready for virtual IP, priority, interface tracking, preempt, and timer tuning configuration with Jeremy’s CCNP Routing/Switching video series.
🌐 Download the Free Ultimate Networking Cert Guide: blog.cbt.gg/pdyn
⬇️ 13-Week Study Plan: CCNA (200-301): blog.cbt.gg/rhst
Start learning with CBT Nuggets:
• Cisco CCNP Routing and Switching | courses.cbt.gg/6gj
• Cisco CCDP Design | courses.cbt.gg/8c5
• Cisco CCNA (200-301) | courses.cbt.gg/h6s
• Cisco CCNA Routing and Switching (100-105 ICND1 & 200-105 ICND2) | courses.cbt.gg/4lv
Jeremy is really the best instructor I have seen so far., it doesn't matter how long are his videos he is able to make them so entertaining that I never get bored or tired.
Dearest Jeremy, though I love you too much, my wife is jealous with you as she has been complaining that I am listening you more than that of her since 2008. Anyway you are my great teacher. May Allah (the God) bless you to serve the world so beautifully.
This was one of the sickest lab demo's I've ever seen. Thanks Jeremy!
Impeccable teaching spiced with great energy and humor. This is inspirational for anyone lerning (and teaching) networking.
Question: HSRP vs VRRP?
So GREAT!!! You had me laughing and excited like a 10 year old.. Thank you for an amazing example. I have a new love and HSRP be thy name.
Brilliant Jeremy, I've always liked the enthusiasm and humour that you add to your tutorials that make them so enjoyable and informative to watch.
I have been following your great tutorials for Cisco Voice studies as well and have learned a great deal from those DVD's.
To quote an earlier message, I love your nuggets...
Kind Regards
Paul
Extremely useful and very well communicated.
my favorite topic!! I like the enthusiasm this guy show up!
Wow, that was awesome. Great job we loved it.
Bryan McGann
You're the man! Thanks a bunch. Very informative.
That's HSRP... and Jeremy... after a dozen Redbulls :)
Try watching on 1.5x!
yeah i usually watch stuff sped up and i thought this was at least 1.5x already!
I loved the fping experiment!
You are an outstanding instructor.
Good job Jeremy. Thank you!
Very informative Jeremy
Loved the energy and explanation
Thank you!
Loved fping!!!
What a tempo :) You can do CCNA in like 4 hours in this pace :D Love it, still a great and understandable lesson.
now I know the purpose of decrement command
Dude )) the attitude you explaining things is hilarious )
you are amazing ,,, i love your nuggets , it is very useful
Err ... That can be taken either way ... lol
Great video Jeremy. QQ, what happens if both links between the L3 Switches are disconnected?
awesome thnqq
hi Jeremy, can we use EIGRP pairing between the cores to redistribute the static route instead of using HSRP, in scenarios where we have 100's of vlans and if all vlans are not configured for failovers. What kind of issues should we anticipate in implementing this solution?
You are amazing 😂
Thank you for the video. I have configured the same thing, but I am getting error messaged duplicate IP address. can you please help me how can I resolve
LOL Thanks for this vid it was very helpful. Im glad I understand this enough to keep up with how fast you are explaining things because you sound like you are on your 8th cup of coffee after taking 6 caffeine pills 4 shots of espresso and 3 red-bulls before 9am.... and you have to pee
Should every group number be identical for each vlan?
Hello Jeremy, Why Is the hello timer set to 3secs and not a default of 650ms as you demonstrate, thus reducing the failover time ??
Robert McCormack Good question - 650ms timer may be too aggressive for some network equipment (causing it to bog down). Remember, HSRP was developed back in 1994...we were in a very different world of network gear back then.
Yeah Yeah Jeremy, you had mentioned that in old Nugget ( ICDN 2 ccna CBT Nuggets),
i want to add something that you had mentioned which is increasing trafic in network and also increasing processing in CPU, but it's okay with recent cisco devices.
Hello Mr Jeremy, if I have multiple VLANs on my switches and I want to configure redundancy on the switches. Will I have to configure the redundancy for each VLAN. Thank you sir.
Can you use HSRP on Nexus peer switches in a VPC domain?
You definitely can. That's actually how you can make your vPC peer switches Active-Active. You just need to point the server to the gateway and then you can route your traffic to your northbound network.
On NX-OS you should use hsrp instead of saying standby in your configuration.
Also to proxy both your actual MAC addresses and your vMAC, go under the vpc domain and say peer-gateway.
Hello Jeremy, How config HSRP in SW 3560 :D
Can someone explain the purpose of links between L3 switches?
Those are the Peer links between Peer switches. Some terms for vPC (Virtual Port Channel). vPC is a solution for increasing HA (High Availability) in Tier 3 design Data Centers.
When you are using vPC in your network from your host's point of view the two physical switches in your Aggregation layer are just only one logical switch, so in case of failure, your control plane traffic will be keep running. What Jeremy tested here was for the Data plane traffic. If you go to Cisco documents, under Data Center switches (both 7Ks and 5600 switches) you will find the related documents.
One command that I have hard time to understand is the "Preemt' in HSRP...that's is mean that if configure in the Active Router it keeps the Active even if the interface fails...? Please somebody....?
No, it means that it'll switch to "active" or "standby" according to "priority" right away. If you don't have "preempt" it might stay as "Active" even though it's priority is lower than of the other one in the group with higher priority.
Forget the track for a few mins, let say we have two routers R1 and R2. R1 has HSRP's priority 200, R2 has HSRP 's 150 priority. Both R1 and R2 are powered on , R1 becomes the master while R2 is back up. R1 becomes the master because of higher priority . Let say we power them down, and power on R2 only, when R2 powers on, it becomes the HSRP master as there is no contention.
Next we power on R1, though R1's has higher priority, R1 is relegated to back up role. In our example though R1 has a higher priority but yet acting as back up router. If R1 were configured with preempt command, R1 would become the master.
Simply put preempt command tells the router configured with preempt, if you are qualified to be a master, and there is already another router acting as a master, feel free to take that role away and becomes a master.
My HSRP routers won't communicate with each other because each Router in my HSRP group is connected to the rest of the network via a layer 3 switch, that switch has IP routing enabled. The HSRP packets never go past the distribution layer switches and therefore the 2 routers can't form an HSRP adjacency, anyone else run into this issue? Any help is greatly appreciated.
Its cool, but to get +/- the exact time of VIP unreachable, it is not enough to set the interval for fping. You must count the time it waits for a response before fixing the timeout for the sent packet.
im facing "hsrp duplicate address".
i don't get it why you decrement the second switch if it fails, if you have preempt it will never be the main switch if the other one doesn't fail. I mean, yeah the R2 fails, no biggy, R1 was always there being the higher BID.
Hi, Alexandru! You can have quite a few different scenarios. One is the whole router goes down, in which HSRP will failover to R2 per se. The other being an interface, which could depend on the topology, but still failover to R2. With preempt on both, the highest priority R1 will be active, and when it comes back online it will resume the active state. Tracking an interface can be used depending on how the network was designed. All of this is really to allow fine-tuning based on the network requirements your organization has. Hope that helps!
You say one router will be the active and all the others will be standby. Isn that (technically) incorrect? One will be active, one will be standby and all the others will be in Listen mode I think. If the Active one fails, the standby will become the active and one of the others will become the standby.
In redundancy protocols such as STP we have two types of terms to refer to our devices/interfaces:
1- The role of the interface.
2- The state of the interface.
Port's role can be: Root, Desg, or Alt
And Port's states can be: Disabled, Blocking, Listening, Learning or Forwarding.
In terms of HSRP we have two roles for our routers (or for our interfaces), which are Active router and Standby router, but roles are also referred to the routers state. If you look at the HSRP packet you will see that each router in the standby group implements a state machine. The state field describes the current state of the router that sends the message. Details on the individual states are: 0 - initial, 1 - learn, 2 - listen, 4 - speak, 8 - standby, and 16 - active.
Think about this way, in HSRP roles are Active and Standby, and interface states are: initial, learn, listen, speak, standby or active.
I hope it could help. \m/
650ms? NFS will notice :D
Hej bo