[c-nsp] Re: need help on switch configuration (Arturo Servin)

Tue May 17 17:11:44 EDT 2005

    In this case it won´t. One trunk only carries vlan 100 and the other 
only carries the vlan 101 (I do not know why they are using trunks to 
carrie just one vlan, but, I was not the original person who post the 
problem).

    So, because one port carries only 1 vlan, there is not bloking 
ports. If both trunks carries the same vlan(s), then it will one port 
become root/designated port and the other will be blocked. But also you 
can put some cost per vlan and you can have both ports working, one for 
one vlan, and the other for the other one.

-as

Feng Wang wrote:

> you need configure EtherChannel between your two switches. If you have two trunks between the two switches, one trunk will be put into STP disable mode. Bind the two trunk into one EtherChannel.
>
>Regards,
>---Feng
>
>-----Original Message-----
>Date: Tue, 17 May 2005 12:59:51 -0500
>From: Arturo Servin <aservin at remoteconfig.net>
>Subject: Re: [c-nsp] need help on switch configuration
>To: Raj Panchal <raj.panchal at vsnl.co.in>
>Cc: 'cisco-nsp' <cisco-nsp at puck.nether.net>
>Message-ID: <428A3117.2080602 at remoteconfig.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>    Try to check first physical status:
>
>show int fas 0/23
>
>    Then the trunk status:
>
>sh int fas 0/23 trunk
>
>    Finally check for STP. If STP is working for that vlan you can sure you trunk is OK. Yo should see the port in forwarding and the root (that may be the same switch, depending in your configuration in your LAN).
>
>Best Regards,
>-asn
>
>
>
>Raj Panchal wrote:
>
>  
>
>>Where is ur router connected which port ? 
>>Is ur router doing intervlan routing ?
>>Which port is ur second switch connected on the first switch ? Is it trunk ?
>>Is it trunking both the vlans ? Also both the vlans should be there in 
>>the vlan database of both switches
>>
>>Also check whether ur getting appropriate mac address in appropriate 
>>vlans on the switch connected to ur router and switch connected to ur 
>>PCs in question.
>>
>>Raj
>>
>>
>>-----Original Message-----
>>From: cisco-nsp-bounces at puck.nether.net 
>>[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of snort bsd
>>Sent: Saturday, May 14, 2005 9:39 AM
>>To: cisco-nsp
>>Subject: [c-nsp] need help on switch configuration
>>
>>Hi All:
>>
>>I have two switches and they are connected via crossover cable. now i 
>>have two vlans (100 and 110) configured and one works fine. but another 
>>just doesn't work, meaning that it just doesn't pass trafifc. this vlan 
>>is 192168.8.0/27; the servers, the router interface (gateway) just 
>>don't talk to each other. here is the configure:
>>
>>version 12.1
>>no service pad
>>service timestamps debug uptime
>>service timestamps log uptime
>>service password-encryption
>>!
>>hostname sw0-4200-oam
>>!
>>enable password 7 046802030224425D
>>!
>>clock timezone GMT -6
>>ip subnet-zero
>>!
>>!
>>spanning-tree mode pvst
>>no spanning-tree optimize bpdu transmission spanning-tree extend 
>>system-id !
>>!
>>!
>>!
>>interface FastEthernet0/1
>>switchport access vlan 100
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/2
>>switchport access vlan 100
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/3
>>switchport access vlan 100
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/4
>>switchport access vlan 100
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/5
>>switchport access vlan 100
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/6
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/7
>>switchport access vlan 110
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/8
>>switchport access vlan 110
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/9
>>switchport access vlan 110
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/10
>>switchport access vlan 110
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/11
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/12
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/13
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/14
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/15
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/16
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/17
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/18
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/19
>>switchport mode access
>>spanning-tree portfast
>>!
>>interface FastEthernet0/20
>>!
>>interface FastEthernet0/21
>>!
>>interface FastEthernet0/22
>>!
>>interface FastEthernet0/23
>>switchport trunk allowed vlan 100
>>switchport mode trunk
>>speed 100
>>duplex full
>>!
>>interface FastEthernet0/24
>>switchport trunk allowed vlan 110
>>switchport mode trunk
>>speed 100
>>duplex full
>>!
>>interface GigabitEthernet0/1
>>switchport mode trunk
>>!
>>interface GigabitEthernet0/2
>>switchport mode trunk
>>!
>>interface Vlan1
>>no ip address
>>no ip route-cache
>>shutdown
>>!
>>interface Vlan115
>>ip address 10.10.100.11 255.255.255.224  no ip route-cache !
>>ip default-gateway 10.10.100.1
>>no ip http server
>>no cdp run
>>!
>>line con 0
>>line vty 0 4
>>login
>>line vty 5 15
>>login
>>
>>what did I miss? trunk port 23 seems to work fine and I ahve no problem 
>>to access network 10.10.100.0/27, not trunk link 110 (port 24). tried 
>>different ports and the results were the same:
>>
>>globalnet-jsa#ping 192.168.8.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 192.168.8.1, timeout is 2 seconds:
>>UUUUU
>>Success rate is 0 percent (0/5)
>>sw0-4200-oam#ping 10.10.100.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.10.100.1, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/16 ms
>>
>>tia
>>
>>
>>
>>Find local movie times and trailers on Yahoo! Movies.
>>http://au.movies.yahoo.com
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>>
>> 
>>
>>    
>>
>
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