About Steve Zhou

Steve Zhou · 07-05-2020

Hi,When I was calculating aggregating routes for (192.168.0.0/24 ~ 192.168.7.0/24), a quick question jumped into my head was what about 192.168.8.0/24? It is a valid subnet, but it's not part of 192.168.0.0/21. What if I did't have the next 8 subnets...

Steve Zhou · 06-25-2020

Hi,As we all know, route aggregation reduce the size of routing table and save processing power when re-calculating routes on the main/core router. Could you help me to understand how does the main/core or upper stream router make the routing decisio...

Steve Zhou · 03-11-2019

Hi,I'm seeing those -C, -K, -L works as the value for the Regulatory Domain column here, https://www.cisco.com/c/dam/assets/prod/wireless/wireless-compliance-tool/index.htmlMy questions is, 1. who defines these letter-based Regulatory Domain? Is it C...

Steve Zhou · 01-02-2019

I recently see more than 10% of retransmission from a sniffer trace via wireshark. It sounds really a big problem to me since on Ethernet, I vaguely recall that the baseline of retransmission rate is about 0.5% (correct me if I was wrong)? I am not s...

Steve Zhou · 01-17-2018

Hi, On this diagram, the antenna is at the center of the circle. The strongest signal is at the outer ring. The signal strength attenuates as it travels, then why the signal strength at '3' is weaker than '1'? Isn't '3' is closer to the antenna? I ...

Steve Zhou · 07-07-2020

The drawing can be misleading. I think I can explain my own question as: since 192.168.8.0/24 cannot be aggregated, it is simply that we won't have an aggregating route on the upstream router (the left one), there will still be a single route to 192....

Steve Zhou · 07-07-2020

Oh...yes, I made a typo, 192.168.8.0/24 is the one with the longest prefix matching. And if the packets was destined to 192.168.9.100, then we should get a destination unreachable (no route) error if I was correct.

Steve Zhou · 07-05-2020

Also, it reminds me a general rule of route selection that is the longest prefix match. In a case where on the upstream router, there is an entry for the next /21 subnets block that is 192.168.8.0/21 and another entry for 192.168.8.0/24. For an incom...

Steve Zhou · 06-27-2020

Hi @Richard Burts , I am in learning the theory of route aggregation. With the help from @Giuseppe Larosa and you, I think I've cleared my question. As you mentioned, the core router (which I didn't draw) is the router who was benefit from the aggr...

Steve Zhou · 06-27-2020

thanks @Giuseppe Larosa , I think I got your point. The upper stream router in the white-boarding also contains the component routes, not just the aggregate route. The aggregate route will be distributed to the left of the world so everyone now knows...

Member Since	‎12-17-2012 10:11 PM
Date Last Visited	‎07-08-2020 08:41 PM
Posts	73
Total Helpful Votes Received	2

User Statistics

User Activity

non-full routing aggregation problem

how routing decision was made with route aggregation?

what does the English letter means on the Wireless LAN Compliance Lookup page?

what is the baseline of an 802.11 wireless network retransmission rate?

how to read the polar chat?

Re: non-full routing aggregation problem

Re: non-full routing aggregation problem

Re: non-full routing aggregation problem

Re: how routing decision was made with route aggregation?

Re: how routing decision was made with route aggregation?