The Two Principles Of Troubleshooting
- Never trust someone else’s configuration.
- Don’t trust your own configuration.
But in all seriousness. If you’re migrating configuration, this would be a good place to start:
- Check all your IP addresses are consistent.
- Check your masks are consistent.
- Check your interfaces are correct.
- If you’re working with peers, check your IP addresses for the peers are correct.I mean all 4 octets. Not just the last one, or two, or three. ALL FOUR. If it’s v6, then FML. Bite the bullet and write a script.
- Is there a naming convention to follow? There’s a temptation when migrating to stick with the old name, but new devices may require a different convention is adhered to. Reasons for this range from the whimsical to the valid.
If you’re coming up with something new, and it involves addressing new interfaces then start with this:
- First check your IP allocations are correct. By this, I mean check if you have any hierarchy or ordering. For example, do you reserve addresses by site, geographic location or application? If you do, then make sure these are consistent with what you’ve planned.
- Is your addressing valid? i.e: Are the subnets and host addresses you’ve assigned correct? Continue reading
Check Out the Designing Active-Active and Disaster Recovery Data Centers Webinar
The featured webinar in October 2016 is the Designing Active-Active and Disaster Recovery Data Centers webinar, and the featured videos include the discussion of disaster avoidance challenges and the caveats you might encounter with long-distance vMotion. All ipSpace.net subscribers can view these videos, if you’re not one of them yet start with the trial subscription.
As a trial subscriber you can also use this month's featured webinar discount to purchase the webinar.
Netcracker Offers an NFV Marketplace and Integration Service
It takes some of the risk out of NFV for service providers.
Worth Reading: Why Google Gadgets are so Cheap
The post Worth Reading: Why Google Gadgets are so Cheap appeared first on 'net work.
snaproute Go BGP Code Dive (12): Moving to Established
In last week’s post, the new BGP peer we’re tracing through the snaproute BGP code moved from open to openconfirmed by receiving, and processing, the open message. In processing the open message, the list of AFIs this peer will support was built, the hold timer set, and the hold timer started. The next step is to move to established. RFC 4271, around page 70, describes the process as—
If the local system receives a KEEPALIVE message (KeepAliveMsg (Event 26)), the local system:
- restarts the HoldTimer and
- changes its state to Established.
In response to any other event (Events 9, 12-13, 20, 27-28), the local system:
- sends a NOTIFICATION with a code of Finite State Machine Error,
- sets the ConnectRetryTimer to zero,
- releases all BGP resources,
- drops the TCP connection,
- increments the ConnectRetryCounter by 1,
- (optionally) performs peer oscillation damping if the DampPeerOscillations attribute is set to TRUE, and
- changes its state to Idle.
For a bit of review (because this is running so long, you might forget how the state machine works), the way the snaproute code is written is as a state machine. The way the state machine works is Continue reading
Level 3 Promotes Dugan to CTO and Tinic to CIO
Dugan will replace Jack Waters who left the company in July to be CTO of the Zayo Group
DT Debuts IoT Platform That Supports Multiple Cloud Services
The multi-IoT platform will be housed at the company’s cloud data center, which is known as the “House of Clouds.”
Exclusive In-Depth Interview: HPE’s Big OpenSDN Bet on OpenDaylight
SDxCentral sat down with Nachman Shelef, VP & GM of HPE OpenSDN, to dig deep into HPE’s new SDN strategy & details of its OpenSDN controller.
OSPF to IS-IS Migration
There are many reasons of OSPF to IS-IS migration, specifically for the Service Provider networks. Some of these reasons are shared later in the case study. OSPF to IS-IS migration can be done in three ways. In this article I will share, ‘ ship in the night approach ‘ which relies on having both routing […]
The post OSPF to IS-IS Migration appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Worth Reading: Creating a PCE Prototype
The post Worth Reading: Creating a PCE Prototype appeared first on 'net work.