08-01-2022 08:31 AM
Why is VLAN 100 is able to ping to KL Router while VLAN 200 isnt able to? Thanks for any help provided.
08-01-2022 08:38 AM
08-01-2022 09:53 AM
08-01-2022 10:15 AM
Sorry but what does subinterface mean?
08-01-2022 10:19 AM
08-02-2022 08:08 PM
If i do encapsulation, the vlans are able to ping each other which is not correct. I did trunking between the switches, trunking between switch and router. However it does not work, after i changed trunking to access, vlan 100 is able to ping other country network but for vlan 200 it is still unable to ping.
08-02-2022 11:45 PM - edited 08-02-2022 11:49 PM
If i do encapsulation, the vlans are able to ping each other which is not correct
Wrong! This is correct and default behavior; You need ROAS or L3 switch with SVIs to route between VLANs. VLANs do separate and split B-cast domains. That's their job. Traffic from vlan X is not reaching vlan Y by default; L3 device is needed to route traffic between vlans; " trunking between the switches, trunking between switch and router." is not enough. Read CCNA chapter in https://www.ciscopress.com/articles/article.asp?p=2990405&seqNum=2
Note: by default and common practice is to have 1 subent per vlan. You have vlan 100 and vlan 200 in the same subnet 10.19.8.0 /22 (range 10.19.8.1 to 10.19.11.254) with all PCs in 2 vlans having the same gateway router and his IP (this is wrong).
Regards, ML
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08-02-2022 04:01 AM
You need another link to your Router or Router-on-a-stick (with sub-interfaces), aka ROAS, see chapter from the CCNA Odom's book is at
https://www.ciscopress.com/articles/article.asp?p=2990405&seqNum=2
or this post https://community.cisco.com/t5/cisco-software-discussions/encapsulation-dot1q-vlan-id/m-p/4658618#M4969
Regards, ML
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