port trunking from Cisco Router to the DELL Switch

piotrkrol · ‎09-10-2004

hi

howto configurte port trunking from Cisco Router WS-C3550-12T to the managed Switch PowerConnect 5224 from DELL ?

pflunkert · ‎09-10-2004

Hi,

it depends on the functionallity on the other switch. Ethernet trunk interfaces support different trunking modes. You can set an interface as trunking or nontrunking or to negotiate trunking with the neighboring interface. To autonegotiate trunking, the interfaces must be in the same VTP domain.

Trunk negotiation is managed by the Dynamic Trunking Protocol (DTP), which is a Point-to-Point Protocol. However, some internetworking devices might forward DTP frames improperly, which could cause misconfigurations.

To avoid this, you should configure interfaces connected to devices that do not support DTP to not forward DTP frames, that is, to turn off DTP.

If you do not intend to trunk across those links, use the switchport mode access interface configuration command to disable trunking.

To enable trunking to a device that does not support DTP, use the switchport mode trunk and switchport nonegotiate interface configuration commands to cause the interface to become a trunk but to not generate DTP frames.

The following URL describe it in detail:

http://www.cisco.com/en/US/partner/products/hw/switches/ps646/products_configuration_guide_chapter09186a00801cdf4e.html#1200245

Regards

Peter

piotrkrol · ‎09-11-2004

sorry, but I cannot open this link and don't know what's wrong.

I'm a registered user !

and which trunking mode supports Cisco Router WS-C3550-12T ?

greetings

piotr

pflunkert · ‎09-11-2004

Hi Piotr,

here is the link you can use:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a0080211cd3.html

Cisco support DTP as Protokol, but you can also you non-protocol (switchport mode trunk under the interface). The Link will explain it in detail.

Regards

Peter

milan.kulik · ‎09-12-2004

But be careful with the native VLAN.

Non-Cisco switch might not support this feature.

Regards,

Milan

piotrkrol · ‎09-13-2004

what I need, I think, is Link Aggregation:

Static:

http://support.dell.com/support/edocs/network/5p788/CLIG/trunk.htm

Dynamic (LACP):

http://support.dell.com/support/edocs/network/5p788/CLIG/lacp.htm

I'll connect Cisco Router WS-C3550-12T

and managed PowerConnect 5224 Switch

with 2 cables, insted of 1,

to get 2 GB/s instead of 1GB/s

do you think, it works between Cisco Router and Dell Switch ?

milan.kulik · ‎09-14-2004

Hi,

Cat3550 should support LACP.

See http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12120ea2/3550scg/swethchl.htm#wp1057322

Regards,

Milan

aashish.c · ‎09-14-2004

Hi

Cat 3550 support PAGP as well as LACP for etherchanneling. as dell switch supports only LACP so you should configure LACP on cat 3550.

Dell`s trunking means port aggregation. but Cisoc`s trunking is different, it means tagging.

just check that all parameters should be same on both sides.

regards

aashish C

piotrkrol · ‎09-15-2004

hi

how can I configure the tagging on the cisco router 3550 ?

should I create an EtherChannel in my case ?

I mean via CISCO CLUSTER MANAGEMENT SUITE (browser)

under Ports -> EtherChannels -> Ports -> Create ->

enable for example port 9 and 10 (group1) ?

is it correct or works in other way ?

kind regards

piotrkrol

aashish.c · ‎09-15-2004

Hi

in this case if you are sending multiple vlans over connecting links, then you need to enable tagging (dot1q). i`m not too sure whether u get dot`q option in CMS or not.

but u can do this from CLI on both the links on both switches (cisco and dell).

etherchannel`s u can make from CMS but cehck whether u get the option of LACP or not bcoz PAGP is cisco`s proprietary . So if u r not getting a protocol option for etherchannel in CMS it means it will make etherchannel of PAGP, not LACP.

then go to CLI and make it from there.

Milan has given u a doc, can refer that for config. LACP ethetchannels.

regards

aashish C

piotrkrol · ‎09-15-2004

hi

thanks !

what's CLI and how can I get it ?

and how can I enable tagging (dot1q) on both ports from

CLI or telnet ?

regards

piotrkrol

Kevin Dorrell · ‎09-15-2004

CLI = Command Line Interface, i.e. telnet or console

You can enable tagging by usiong switchport command. But beware, the other end of the link needs to be set up as 802.1Q as well. You can read about trunking in this document:

http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010f615.shtml

There are lots of other documents about trunking under:

http://www.cisco.com/pcgi-bin/Support/browse/psp_view.pl?p=Technologies:Trunking&viewall=true

Kevin Dorrell

Luxembourg

piotrkrol · ‎09-15-2004

hi

I have connected CISCO & DELL with 2 cables and have following configuration now:

CISCO#show interface gigabitEthernet 0/9 trunk

Port Mode Encapsulation Status Native vlan

Gi0/9 on 802.1q trunk-inbndl 1

(Po1)

Port Vlans allowed on trunk

Gi0/9 1-4094

Port Vlans allowed and active in management domain

Gi0/9 1-2

Port Vlans in spanning tree forwarding state and not pruned

Gi0/9 1-2

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

CISCO#show interface gigabitEthernet 0/10 trunk

Port Mode Encapsulation Status Native vlan

Gi0/10 on 802.1q trunk-inbndl 1

(Po1)

Port Vlans allowed on trunk

Gi0/10 1-4094

Port Vlans allowed and active in management domain

Gi0/10 1-2

Port Vlans in spanning tree forwarding state and not pruned

Gi0/10 1-2

on the DELL SWITCH LACP trunk is enabled on 2 ports

(connected via 2 cables to the CISCO ROUTER)

everything seems to work and hope it is correct.

piotrkrol · ‎09-16-2004

howto check if trunking is working properly in my case ?

CISCO#show etherchannel port-channel

Channel-group listing:

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

Group: 1

----------

Port-channels in the group:

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

Port-channel: Po1 (Primary Aggregator)

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

Age of the Port-channel = 00d:05h:58m:28s

Logical slot/port = 1/0 Number of ports = 2

Port state = Port-channel Ag-Inuse

Protocol = LACP

Ports in the Port-channel:

Index Load Port EC state

------+------+------+------------

0 00 Gi0/9 Active

0 00 Gi0/10 Active

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

CISCO#show interface port-channel 1

Port-channel1 is up, line protocol is up

Hardware is EtherChannel, address is 000c.85ee.c88a (bia 000c.85ee.c88

MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Full-duplex, 1000Mb/s

input flow-control is off, output flow-control is off

Members in this channel: Gi0/9 Gi0/10

ARP type: ARPA, ARP Timeout 04:00:00

Last input 05:33:48, output 00:00:01, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue :0/40 (size/max)

5 minute input rate 134000 bits/sec, 111 packets/sec

5 minute output rate 73000 bits/sec, 149 packets/sec

5931058 packets input, 845506683 bytes, 0 no buffer

Received 12106 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog, 4884 multicast, 0 pause input

0 input packets with dribble condition detected

7296696 packets output, 843244151 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 PAUSE output

0 output buffer failures, 0 output buffers swapped out