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New task with /30 and/23

NetworkDave
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Mahdi,

The previous problems were attached to multiple already closed/Solved threads and have been fixed. This is a new issue, therefore a new conversation should be started. Since you seem unable to start one yourself, I have done it for you. The new conversation is titled "New task with /30 and/23".

From:

@mahdi benameur 10-20-2022 10:58 AM

hi dave ,

i got a new task where three router ospf with /30 all ip begin with 10.x., between them should communicate where the first three octet are 10.5.6.x in all router connected

and pc 1 : vlan 1 ip address 192.168.1.x/24

pc2 :vlan 2 ip address 192.168.2.x/24

pc3 :192.168.6.x/23 netmasker vlan 3 are connecting to switch 1 which should be connected to router 1 using 802.1 q

from router 2 other side is connected to switch 2 ( pc 4 :vlan 1 ip address 172.16.0.x /23, and pc 7:vlan 2 )

switch 2 should with port-channel, connected to switch 3 which is the last connected to pc5 vlan 2 ip adress 172.16.4.x/23

and more pc6 (/24)to switch 3 connected .

connected to router 3 from the other side there is switch 4 connected with 802.1 q to router 3.

switch 4 is connected to switch 6 and switch 5 using stp

now is the issue from switch 5 to switch 6 which are both are connected using stp .vlan 10 should be blocked here between switch 5 and 6.

ok i have pc 10 /24 subnet conected to switch 5 and pc 9 connected to switch 6

and pc 8 should connected to switch 4

i need your help urgently before tommorow morning

i appreciate any help

you sinceley

mahdi


@mahdi benameur 10-20-2022 11:31 AM

by the way i forget to write the vlan 10ip : 10.0.0.x/24

in the explanation task


@mahdi benameur 10-21-2022 08:01 AM

i have a three routers whereas two router able to see each other in ospf mode while the third are not able to see.

all of them are in /30

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40 Replies 40

mahdi benameur
Level 1
Level 1

Dave

I would like you to send it back today as soon as possible because I have to send back to the supervisor before the end of the day because as you I miss only this part of the vlan 10 blocking in between switch 5 and 6.

I appreciate your help 

Your sincerely Mahdi

 

NetworkDave
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Mahdi,

You need to make the links between Switches (S4/S5/S6) into Trunks. This will enable STP and block the link between S5 and S6.

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mahdi benameur
Level 1
Level 1

i have done all trunk mode but when i write show spanning tree vlan  10 in switch 5 and switch 6 its remains forward not block

this below from switch 6

Switch#show spanning-tree vlan 10

VLAN0010

Spanning tree enabled protocol rstp

Root ID Priority 24586

Address 0060.5CE8.2692

This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

 

Bridge ID Priority 24586 (priority 24576 sys-id-ext 10)

Address 0060.5CE8.2692

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 20

 

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Fa0/1 Desg FWD 19 128.1 P2p

Fa0/4 Desg FWD 1 128.4 P2p

Fa0/2 Desg FWD 19 128.2 P2p

 

and the other from switch 5

 

Switch#show spanning-tree vl

 

Switch#show spanning-tree vlan 10

 

VLAN0010

 

Spanning tree enabled protocol rstp

 

Root ID Priority 24586

 

Address 0060.5CE8.2692

 

Cost 5

 

Port 3(FastEthernet0/3)

 

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

 

 

 

Bridge ID Priority 28682 (priority 28672 sys-id-ext 10)

 

Address 0060.5C4B.2831

 

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

 

Aging Time 20

 

 

 

Interface Role Sts Cost Prio.Nbr Type

 

---------------- ---- --- --------- -------- --------------------------------

 

Fa0/2 Desg FWD 19 128.2 P2p

 

Fa0/1 Desg FWD 19 128.1 P2p

 

Fa0/3 Root FWD 5 128.3 P2p

 

whats should i do

thats all output after changing all switches to trunk mode S4 and S5 ,S6

?

mahdi

NetworkDave
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Mahdi,

Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk encapsulation dot1q
Switch(config-if)# switchport trunk allowed vlan 10

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NetworkDave
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Mahdi,

Send the file with the changes you made

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mahdi benameur
Level 1
Level 1

i will send it to you email

mahdi benameur
Level 1
Level 1

#switchport trunk encapsulation dot1q

this command doesn t work i got like this 

 

Switch(config-if)#switchport mode trunk

Switch(config-if)#switchport trunk encapsulation dot1q

^

% Invalid input detected at '^' marker.

 

Switch(config-if)#

NetworkDave
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Mahdi,

Switch(config-if)# is the switch prompt, it is not part of the command.

switchport mode trunk
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10

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mahdi benameur
Level 1
Level 1

dave

 

have you seen the machine i send it to you ,because today i need to handed over to supervisor, 

what do you mean is not a part of the command where should i write it under interface fa0/3 and interface fa0/4 but it doesn t work my friend

can you do it in the machine directly which will be clear for me

mahdi

mahdi benameur
Level 1
Level 1

this command 

switchport trunk encapsulation dot1q doesn t work in m case

i got an error like i have send it to you in eralier post

NetworkDave
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Mahdi,

I wiped the switches (S4/S5/S6) clean and reconfigured them fresh. STP is  now blocking the link between S5 & S6, thereby blocking VLAN 10 between S5 & S6. PC's 8-10 (VLAN 10) can now communicate locally with each other and remotely to other networks (VLANs). Updated file sent to you.

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