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VXLAN BUM Traffic: Ingress Replication vs Multicast

VXLAN BUM Traffic: Ingress Replication vs Multicast

Handle VXLAN BUM traffic: ingress replication versus multicast underlay, the trade-offs in scale and state, and how each affects the control plane.

admin admin 2026-10-08
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DPDK testpmd: Packet Generator and Forwarding Modes

DPDK testpmd: Packet Generator and Forwarding Modes

Use DPDK testpmd to benchmark and validate NICs: command-line options, core and port masks, interactive forwarding modes and tx-first traffic generati

admin admin 2026-10-08
0 0 0
FreeRADIUS Proxy and Realm Routing Configuration

FreeRADIUS Proxy and Realm Routing Configuration

Configure FreeRADIUS proxying: home servers, fail-over pools and realms, realm stripping, and how the v4 rlm_radius model replaces proxy.conf.

admin admin 2026-10-08
0 0 0
NetBox Custom Fields and Custom Links for Automation

NetBox Custom Fields and Custom Links for Automation

Extend NetBox with custom fields, custom links and export templates: field types, API filtering with cf_ lookups, and Jinja2 links to external systems

admin admin 2026-10-08
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Grafana Loki LogQL: Selectors, Filters and Parsers

Grafana Loki LogQL: Selectors, Filters and Parsers

Query logs with Grafana Loki LogQL: stream selectors, line and label filters, JSON and logfmt parsers, and metric queries from log streams.

admin admin 2026-10-08
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Prometheus Recording Rules and Alerting Rules in Practice

Prometheus Recording Rules and Alerting Rules in Practice

Write Prometheus recording and alerting rules: rule group syntax, the level:metric:operations naming scheme, for and keep_firing_for behaviour.

admin admin 2026-10-08
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vSAN Stretched Cluster: Witness, Sites and Site Preference

vSAN Stretched Cluster: Witness, Sites and Site Preference

Design a vSAN stretched cluster: two data sites plus a witness host, fault domains, preferred site election and witness traffic separation explained.

admin admin 2026-10-08
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Ceph RGW S3 Object Gateway: Realm, Zonegroup and Zone

Ceph RGW S3 Object Gateway: Realm, Zonegroup and Zone

Configure the Ceph Object Gateway for S3: create realms, zonegroups and zones with radosgw-admin, then verify multisite sync and S3 API access.

admin admin 2026-10-08
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Nginx limit_req 限流配置：zone、burst 与 nodelay

Nginx limit_req 限流配置：zone、burst 与 nodelay

详解 Nginx limit_req_zone 与 limit_req 限流配置：漏桶算法、burst 突发缓冲、nodelay 与 delay 的区别，以及 503 状态码自定义。，含 limit_req_zone 内存区域定义、burst 与 nodelay 参数对突发流量的影响，以及 429

admin admin 2026-10-08
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HAProxy ACL Content Switching and TLS Termination

HAProxy ACL Content Switching and TLS Termination

Route HTTP traffic with HAProxy ACLs by host, path and source, then terminate TLS at the frontend with a combined PEM and HTTP-to-HTTPS redirect.

admin admin 2026-10-08
0 0 0
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