Cisco Catalyst Center
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2375 PostsActivity in Networking
IPsec over NAT444 issue
Hello Everyone I have to set up an ipsec tunnel with Lo0 as source of tha tunnel. Nat is activated in My CE and in the ISP level (NAT444)All ipsec and Nat configuration is ok but, and as I know that for the NAT to work correctly, the packet should pa...
ssh to switch refused
hi all,when i try to ssh in to a switch i get a connection refused on port 22ssh robert@10.110.10.4ssh: connect to host 10.110.10.4 port 22: Connection refusedthanks,rob
New to Cisco - Avaya Phones
We are moving to Cisco C9200 Access switches with a Core C9300. Our environment has Avaya IP Office with physical phones on our desks. With our existing Avaya switch, the port the phone connects to is configured with two VLANs. We have VLAN 20 for PC...
NX-OS N9K uses SNMP to monitor routing sessions in multiple VRFs, caus
Hi: I trying to monitor OSPF in multiple VRFs. I have created multiple context in SNMP. Here is what my config looks like:snmp-server context default vrf defaultsnmp-server context abc01 vrf abc01snmp-server context abc02 vrf abc02snmp-server communi...
C3850 upgrade failure
I wanted to upgrade the C3850 in stack from version 16.12.8 to version 16.12.11 in BUNDLE mode.The steps I followed: 1. copy tftp: flash: .... -> successfully 2. no boot system 3. boot system switch all flash:cat3k_caa-universalk9.16.12.11.SPA....
Importance of BPDU Guard and BPDU Filter !!
IntroductionConfiguringBPDUGuardConfiguringBPDU Filter IntroductionIn Networking World we know that to avoid any loops or any problem related to switching arcihtecure the stability of the Root Bridge is of paramount importance in the operation and co...
vPC topology dropping packet
Hello,I have a topology as below. Switch101 and switch102 are vPC peer, and switch201 and switch202 are another vPC peer. All the switches are Nexus 93180-EXHostA is connecting to swtich101 with a orphan port (port-channel)HostB is connecting to swit...
Using DNS to resolve switch hostnames for NTP
Hey all, I'm pretty new to all of this, I just passed the CCNA in June, and have been working as a jr. Net Eng/Admin of my company for about 8 months now.I was asked to configure our core switches at our main office as NTP for the rest of our network...
Nexus Migration from 5500 to 9300 series without interruption
Hello all,I am planning to upgrade my DC with Nexus 5500 to 9300 series without interruption.Can you please give me advices in order to perform this properly ?
DYNAMIC ROUTING WITH ZERO LOOPS
Hello Team,I have a topology as below;I have point to point connections to multiple partners who have different unique prefixes - to avoid overlapping of subnets.They need to access my internal resources - in this case vlan 50 and 70 for respective s...
Resolved! connecting multiple devices with same ip address which can't be changed
Hi everyone , i am quite new . I have been stuck up from quite few days . i have to implement a solution for the below requirement . 1) i have 15 devices with same ip address ( ip address is hard coded inside and can not e changed ).2) each device...
stateful ASA FWs failover
Hi,With stateful ASA FW pairs you configure interfaces with primary and standby IPs.Must standby IPs necessarily be within the same LAN as primaries?If so, must they be within the same VLAN? Or can routing be used to interconnect them instead?For MGT...
NAT problem in the subnet entering the vpn tunnel
I have created a vpn tunnel between the asa firewall (ikev1) and the cisco router. the asa subnet is 192.168.100.0/24, the router subnet is 10.100.0.0/24. The VPN works fine and they can communicate with each other. But I can't NAT the 192.168.100.0/...
Specific SDWAN Design Viability
Hi All, One of our customers has brought up a specific requirement for the SDWAN design at the head quarter office. They have two internet links and two routers at the sites. Internet links are terminated to NTUs. They have asked for the below desig...
TCP MSS not working
Please refer the below topology,Client >>> Cisco router >>> Firewall >>> Upstream device >>> serverI have set mtu as 200 in my upstream device and as exepected when client access the server(http) the packets are fragmented.However when I set tcp-ms...
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