SD-WAN
Cisco SD-WAN – OSPF Authentication: Is Only MD5 Supported via VPN Service Templates?
Cisco, although not explicitly stating it in a direct way, “recommends” for OSPF authentication the use of RFC 5709, which supports HMAC-SHA cryptographic authentication, instead of RFC 2328 Message-Digest 5 (MD5).
11. May 2026.
4 views
SD-WAN
Cisco SD-WAN – cEdge behaves as an OSPF ABR router for a stub area
OSPF in an SD-WAN environment behaves differently compared to what would normally be expected
05. May 2026.
5 views
Cisco ASR 9000
Does Cisco ASR9902 supports 1G or not?
Cisco ASR9902 is high performance compatible router supporting 1/10/25/40/100G ports speed and can be combined changing interface models on router. If 1G is supported on Cisco router, usually I am not considered what kind of SFP types are...
17. August 2024.
1189 views
Cisco ASR 9000
Cisco ASR, do I need FPD upgrade?
Once you are done with IOS-XR upgrade, which is not one line process, you should clean your repository of unused packages from previous image version. Not that you must, but it makes less noise once you start search for actual package version to...
11. September 2024.
886 views
MPLS
Resolving MTU Size Mismatch in MPLS L2VPN Xconnect Config
When working with MPLS L2VPN Xconnect services, one of the common challenges is ensuring proper MTU (Maximum Transmission Unit) configuration. MTU plays a critical role in communication by defining the maximum packet size that can be transmitted...
02. December 2024.
760 views
Nexus 9000 switch
Forwarding multi-tag frames through Nexus 9000
Cisco Nexus 9000 switch is powerful Layer2 and if needed can be Layer3 switch, supporting standard routing protocol including BGP. In general, its position in networking architecture is in Data Centers access leaf switch or as a border switch.
17. August 2024.
1123 views
Cisco ASR 9000
How to find out serial number on IOS-XR chassis?
Unlike IOS, IOS-XR will not show you the device's serial number with the show version or show inventory commands. To be precise, show inventory will display serial numbers, but only for the route processor, line cards, etc., not for the IOS-XR...
02. January 2025.
622 views
Network security
How to sefaly apply AAA on Cisco ASR?
At some point, you need to onboard your network device to controlled access and configuration policy. Prerequisite is of course that user access and authorization to the network devices is centralized with one of the known methods like using...
12. February 2025.
285 views
MPLS
What are key differences between RT and RD in MPLS architecture?
In MPLS (Multiprotocol Label Switching), RT (Route Target) and RD (Route Distinguisher) are key components used in Virtual Private Network (VPN) configurations, specifically in MPLS Layer 3 VPNs. They serve different purposes.
09. December 2024.
1527 views
Cisco ASR 9000
ASR 9000 flexible license comsumption - FC (it is not a Fiber Channel)
Once you registered your brand new Cisco ASR to Cisco licensing portal, guess you are done, right? Almost.
20. February 2025.
237 views