Questions about performance degradation when used with DNS features in GTM solutions
Hi team. Here's the situation I'm in and the questions I have. Situation : A customer is using Window DNS, and in this configuration, an F5 device has been introduced for GSLB purposes. However, the performance of Window DNS is not good, so I am checking if it is possible to use the DNS function on the F5 device introduced for GSLB. Q: I have heard that the performance of the F5 GTM solution degrades when used for DNS functions other than GSLB (I heard from someone that the performance degrades a lot when using BIND). So, I've been looking for official F5 documentation to see if that's true, but I'm not finding it, so I'm asking. Thanks.BIG-IP DNS: Check Status Of Multiple Monitors Against Pool Member
Good day, everyone! Within the LTM platform, if a Pool is configured with "Min 1 of" with multiple monitors, you can check the status per monitor via tmsh show ltm monitor <name>, or you can click the Pool member in the TMUI and it will show you the status of each monitor for that member. I cannot seem to locate a similar function on the GTM/BIG-IP DNS platform. We'd typically use this methodology when transitioning to a new type of monitor, where we can passively test connectivity without the potential for impact prior to removing the previous monitor. Does anyone have a way through tmsh or the TMUI where you can check an individual pool member's status against the multiple monitors configured for its pool? Thanks, all!
GSLB - Monitoring LTM VIP load balancing via iRule
In one of our environments we are configuring a single LTM VIP and load balancing multiple applications via an iRule. We currently have other LTM environments integrated via iQuery with our GTM for GSLB configuration and monitoring. Is there a way to monitor the VIP at the GTM level via iQuery that would give a true back-end pool status? Since, let's say, we are load balancing 100 different applications via a single VIP, if 99 of them went offline, the VIP would still show as ONLINE/GREEN. Or would we even go as far as integrating via iQuery and adding a dependency monitor of the pool itself instead?
BGP Over 2 vlans to 2 Network switch
Hi, im testing a new design for ltm, when’re big ip will have 2 transit vlans to switch a and switch b and then i ll establish bgp over it. Switch will advertise default to Big ip and big ip will advertise vip and snat to switch. I use snat for vip since traffic should not drip when a switch fails. The way im advertising snat is by creating them as virtual server forward ip type with loose close and initiation enabled, and vip is configured as standard type with this snat. These will be advertised to bgp from kernal. I enabled connection mirroring for this vip, disabled autolast hop globally and vlan keyed connections. My expectation is connection to vip don’t drip when a switch fails or during big ip failover . And with bgp I disabled graceful restart and enabled bfd. This works with what I did so far. My question if if there is something I should think about before implementing in production or any that I can do make this better. Is my approach to advertise snat as forwadip vs correct ? I want to do similar approach with gtm as well and I’m thinking if I should create a non floating self ip like loopback for listener and snat to backend vip?
how to monitor the axfr master response
Hi everyone. Previously I had a zone transfer configuration between GTM (slave) and Microsoft AD (master). Recently, I have experienced problems with axfr access to the server with intermittent status, but for ixfr it is still monitored normally. I tested both using the dig tool. related to this, does anyone have experience, how to monitor the axfr master response? such as placing the master server into a pool, and monitoring it like a health monitor. some provide references to monitor links and external monitors, but I don't really understand. thank you
Retrieve GTM pool member addresses (Bigrest)
A wide-IP has a pool of servers that are virtual-servers on an LTM. I would like to retrieve the pool member addresses of the virtual servers used in the wide-IP pool using the Bigrest Python library. wide-ip = site.com Pool Name = site_pool Pool Member A = site_a_vs (server = ltm_a) Pool Member B = site_b_vs (server = ltm_b) I can load the wide-IP which provides a poolReference. I can then load the pool, which provides a membersReference. The membersReference provides a serverReference (the LTM) and the vs name. From here, I can load all virtual servers on the server provided by the serverRefence, but unsure how to retrieve only the virtual servers that are relevant to the wide-IP. There is no virtualserver ID provided by the membersReference or ServerReference.
