Switching

UDLD Problem after switch reload

I have the following problem withSituation:- 2x 3750G-12S Distribution-Switches (DS) and several 3560/2960 Access-Switches (AS)- redundant Fiber optic uplinks between AS and DS- Cross-Stack Etherchannel config on all uplinks- UDLD aggressive mode con...

how to ?

hello every one.-how can i connect an old 2600 router to a linksys WRT54G2. to access the internet. i think it is not posible-what device do i need to be able to do it

Resolved! site to site ipsec vpn, ike phase 1

HI everybodyPlease consider the following example. R1---VPN------R2R1 and R2 are configured properly for vpn. Both routers use policy 1.Let focus on R1ISAKMP phase 1R1(config)# crypto isakmp policy 1R1(config-isakmp)# encr 3desR1(config-isakmp)# ha...

Unicast NLB High Traffic Issues

Hi, i recently identified all switch ports in my network on 6509 core were Transmitting Mail server Exchange traffic that was destined for Unicast NLB cluster. and it was impacting various HOST machines NIC cards/performance.After reading this articl...

which module fiber support 40km?

Dear All,I have Cisco switch 3560 and 3750 and i would like to connect both switch with fiber destand 40 Km,Could you let me know which P/N that support on this? Best Regards,Rechard

Measuring StackWise backplane performance

Hi all,I have a stack of 4 x 3750-E switches that have been fully populated with 10Gbps X2 fibre modules for 10Gbps SAN connectivity. I want to know if there is a bottleneck on the backplane of the stack, either on the individual switch's backplane ...

Building a network with DHCP and Voice

Hello All, I'm in the process of building a network that will consist of the below:2 Routers (Primary and Backup)2 Switches (16-Ports each)20 IP Phones (10 on each Switch)Voice Gateway (Don't know anything about it)Wireless Access Point (Still no...

Resolved! MS-NLB-virtserver

hellowe installed recently 2 microsoft servers that use network load balancing configured in NIC cards.as a consequence, i discovered that any packet sent to these servers is broadcasted to all switch ports!using sniffer i found that MAc destination ...

Resolved! ISSU in 4503E

Hi all, I want to know that whether ISSU feature is available in 4503-E ? i have heard someone was telling me that ISSU is only supported with redundant supervisers so 4503-E model doesnt support ISSU.Can someone pls confirm

issue with config switch vlan

Getting teh following error on my config for a switch.00:36:26: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on FastEthernet0/1 (1), with sw-testlab. dgit.net GigabitEthernet4/0/20 (104).lab1#show run int vlan 808Current configuration...

sending the destination MAC first

What is the reason behind sending the destination mac address first in an ethernet frame?one reson I can think of is- Seding the Dst MAC first will help the switch to take the forwarding decision (cut through switching tech) without waiting for the r...

IP SLA. Tracking DNS Server Reachability in the Two ISPs

Hello all,I am trying to understand whether the CCNP route guide's article has no sense or I am a dumbass, because I do not find any sense in the example below:R3 represents a branch office connected to two ISPs. In this scenario Cisco IOS IP SLAs ar...

1941 ADSL card

Hi,I have a Cisco router 1941 with an ADSL card, connecting the ADSL line, i configured a dialer interface but couldnt understand how to bind the dialer with an ethernet interface. I think i should have a bridge cause there is an interface ethernet 0...

Resolved! Etherchannel partners

i just took over the network from someone who left the company. im trying to track down(on a 6509) what devices are connectied to the other side of an etherchannel. is it possiable to view the mac addresses that are connected to the etherchannel?