Questions tagged [cisco]

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21 views

VLANS trunks doesn't work

Switch0 configuration: S0(config)# vlan 10 S0(config-vlan)# name dev S0(config-vlan)# vlan 20 S0(config-vlan)# name tech S0(config-vlan)# exit S0(config)# interface f0/1 S0(config-if)# switchport mode ...
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1answer
25 views

In France , what language is the Cisco IOS for routers and switches?

If I accept a Network Engineer job in France, what language will the Cisco , Juniper, etc, IOS communicate in? If it is in French, is there an acceptable workaround that I can install in routers that ...
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0answers
7 views

Netmiko - problem with confirmation in configuration mode [closed]

I just start using netmiko and have a problem with one script. The script should delete a user and create another one in Cisco device. The problem that I have is with confirmation in configuration ...
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1answer
39 views

sFlow configuration tcam question for Cisco Nexus 9396PX platform

I am trying to configure sflow on Nexus 9396PX switch and having some difficulty to understand tcam region. hardware access-list tcam region span-sflow 256 ! feature sflow sflow counter-poll-interval ...
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1answer
69 views

What does it mean when default route is to a network address?

The default route as configured in a Cisco router is as shown below: Gateway of last resort is 103.0.0.0 to network 0.0.0.0 What I have came across so far is that the gateway of last resort is ...
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0answers
21 views

What is the first and last address of a subnet? Is it the Network/Broadcast or the First/Last usable address? [duplicate]

For a computer science exam the question was: Find the first and last address of the subnet containing XXX.XXX.XX.XX/XX I put the network and broadcast address and got it wrong. Those who put the ...
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1answer
43 views

DHCP Help 3560-CX + Aruba AP515

The problem VLAN 100 is not assigning IP address to the SSID Guest from the AP, but Aruba is Tagging the SSID to be VLAN 100. How do I get the Switch to assign the DHCP? On the switch, it seems to ...
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1answer
30 views

Difference beetween MTU, ipv4 MTU and mpls MTU

In a Cisco configuration, what is the difference beetween the MTU, ipv4 MTU and the MTU configured into the mpls section of an interface ? interface X mtu 9214 ipv4 mtu 9180 [...] mpls mtu 9200 !...
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1answer
42 views

BGP route advertised but cannot Ping

I have this rather basic setup with 3 routers running BGP, each has Loopback int configured. Is there an extra step required for R2 to ping R4 Loopback interface despite it's being advertised? R2#sh ...
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1answer
20 views

vPC between Cisco nexus 9236C and 9336C

I have a Nexus N9K-C9236C and I would like to add an other one to have redundancy with vPC fonctionnality (like describe here). The point is my suppliers don't sell this model anymore because it has ...
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1answer
22 views

Cisco IOS traffic thru VRF

I know, VRFs are meant to create a seperation on layer3. There are certain ways to "break" thru a vrf in a sense with things like: Tunnel interfaces IP helper NetFlow But is there a way ...
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3answers
48 views

BGP-OSPF route injection doesn't work

Background: BGP is fully functional and works as expected so nothing need to worry about, the problem is the route injection between HK_Office <> HK2 and LON1 <> LON_Office, as you could ...
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0answers
12 views

DATA & VOICE VLAN ROUTING BETWEEN 2 ROUTERS [closed]

Good Afternoon All- I would appreciate a little help with a current issue I am facing... I can ping all Network Segments, all Routers, all Switches, and all Servers on the network. PROBLEM IS: I CAN'T ...
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0answers
12 views

Arp Access-List Without An Interface [duplicate]

I have dhcp snooping an arp inspection setup on my VLAN. I have a number of clients that need to be statically set on this VLAN but still plug into a DHCP access port on the VLAN. I have ip dhcp ...
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1answer
38 views

announce a route without add it to routing table

i have two bgp session , one of them is with my IP transit and another one is with my customer, my customer send a /32 to me by bgp and community 12345:666 and i want to announce it to my IP transit ...
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1answer
27 views

Ping ICMP is always sent to the same PC via switch from router

I am quite new to this world and I'm currently to understand why an ICMP ping is always sent to the same PC. In this case, I am sending a ping from PC_F to Server PT. ping 192.168.1.2 In the ...
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0answers
20 views

How to check if flowspeck works based on netflow monitoring?

I'm looking at netflow9 docs and only usable field I find is FORWARDING STATUS. However if I set my flowspec rule to discard pkts which have size larger then 400 I have some mix of forwarded and ...
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9 views

6504E with SUP720-3CXL

i have the following in my stock : 1x 6504E with full fan and trays 2x WS-X6704-10GE with DFC3CXL daughter card 2 x WS-SUP720-3CXL The SUP720-3CXL datasheet shows it has 1G Dram and support 1M ipv4 ...
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1answer
24 views

Why is Cisco router PPPoE client configuration so complicated? [closed]

In some routers like Ubiquiti's UniFi Security Gateway, when you want to connect to internet via PPPoE, all you have to do is go to the web GUI or controller, go to WAN settings, hit the dropdown ...
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2answers
18 views

Concurrent site-to-site VPN tunnels through dual ISPs (with 2 couples of Cisco ASA) between same devices

I currently have a simple site-to-site VPN setup, connecting machines from site 1 to site 2 through 1 ISP, using a set of ASA 5506X. All is good. I'd like to "double" that setup for ...
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0answers
20 views

Cisco ASA drops packets which match crypto acl. What the reason? [closed]

I've some problem with IPSEC tunnel between Cisco ASA and Fortigate. For some reason, packet 10.12.4.0/12 to 192.168.0.0/16 drops by ASA, despite the fact 192.168.0.0/16 is present in crypto ACL. Can ...
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0answers
18 views

Cisco Redistribute of SVI routes into BGP

I have a Cisco Nexus and i have 250x SVI on them and each SVI has different prefixes, this sample from one my SVIs : interface VlanXXXXX description USER no shutdown no ip redirects ip ...
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0answers
23 views

CISCO ASR 1006 , RP1 disabled

I have issue with cisco1006 router, i get this error messages: %IOSXEBOOT-4-BOOT_ACTIVITY_LONG_TIME: (rp/0): load_crash_kernel took: 2 seconds, expected max time 2 seconds %IOSXEBOOT-4-...
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1answer
20 views

Cisco C3064PQ advertise 600x /32 Routes

i have a pair of nexus 3064pq in a vpc mode and i want to add 600x /32 network in my advertisement under router bgp XXX , so i want to know if there is no problem with this and it does not cause ...
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0answers
61 views

Cisco site-to-site VPN tunnel Failed to find a matching policy [closed]

I have PaloAlto (PA) and Cisco ASA 5585-X located on two different sites, trying to configure IPsec VPN tunnel. [PA]-----------(internet)-----------[Cisco ASA] If i ping from Cisco ASA side lan to PA ...
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2answers
33 views

transfer vlan from one cisco switch to an other through a central cisco switch

I can't figure out how to pass one vlan from one switch to an other: Let's say, I have 2 valns: Vlan 1 and Vlan 2 3 cisco switches: Cisco Catalyst 3560g (central switch) Cisco SG-300 (with native ...
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1answer
13 views

Cisco GRE Tunnel on 6504E

i have cisco 6504e with WS-X6704-10GE and VS-S2T-10G-XL and i want to lunch 10-12x GRE tunnel with all of GRE tunnels has around 500-600mbps traffic, i want to know 6504e can handle this GRE traffic ? ...
5
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1answer
116 views

Change BGP Dampening parameters for a specific neighbor

When you configure the BGP Dampening, the configuration is set for all eBGP neighbor in a Cisco router. There is a way to customize the parameters for a specific neighbor ?
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1answer
52 views

upgrading power sequencer on Cisco 5548UP Switch

The situation is that i've 5548UP Switch with very old software version: Software BIOS: version 3.6.0 loader: version N/A kickstart: version 7.0(5)N1(1) system: version 7.0(5)N1(1) Power Sequencer ...
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1answer
65 views

How do I apply an access list on a switch?

I'm configuring a very small network on packet tracer 8.0 and I have a single 2960-24TT switch which is connected to 2 PCs and 1 router. Everything is on the 24.17.2.0/24 network and I added a VLAN. I ...
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1answer
19 views

Enabling interface TenGigE0/0/2/0 pls help

I'm trying to enable just one SFP+ port for testing a 10gbit NIC. I cannot, however, for the life of me find how to enable a port. To me, it would make sense to conf t interfaces TenGigE0/0/2/0 admin ...
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1answer
21 views

Cisco Flexvpn Dvti Setup not working any more if Spoke site is behind NAT

I have set up a platform (consisting of 2x ASR1001X) routers as Flexvpn DVTI hubs to terminate different remote sites (mostly ISR1000, but also older C886s) into different VRFs. The authorization ...
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2answers
39 views

Cisco 800 Series ARPing's to ISP are Intermittant

According to my ISP, our occasional internet outages are do to a router configuration problem. They say the router must ARPing the ISP regularly. Failure to do so in 4 hours results in outgoing and ...
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0answers
64 views

Cisco Modeling Labs (CML) & new ASAv image

I am trying to add additional ASAv images in Cisco Modeling Labs (Cisco CML, formerly named VIRL). I download the qcow2 file from the official Cisco site. According to the documentation: https://...
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2answers
56 views

ip dhcp snooping Kills DHCP Ports

I am working on implementing DHCP Snooping on my switches and have found that when I do so it kills the DHCP connection to the clients. The network is as such: The server with DNS is providing DHCP ...
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1answer
24 views

Why does a Cisco router advertise a prefix with NDP RA when it has an address in that range?

If I write interface Vlan1 ... {ipv4 config} ... ipv6 address 2001:DB8:5432:101::/64 eui-64 ipv6 address FDAA:DB8:5432:101::/64 eui-64 ipv6 enable ipv6 nd prefix 2001:DB8:5432:101::/64 ipv6 nd ...
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1answer
27 views

Working with credentials encrypted credentials on Aruba / HP switches

I come more from a cisco back ground and there when i show the running configuration i can see the encrypted / hased local user password. This makes it more secure to have in a automation tool where I ...
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0answers
19 views

Putting vrf on an OSPF statement, interface question. Using CML

If you put the ospf statement with a vrf Router ospf 1 vrf OUTSIDE network 10.10.10.10 0.0.0.3 area 0 area 0 authentication message-digest when I go to put the ospf on an ipsec tunnel ing tu0 ...
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0answers
25 views

Does modifying a ASA tunnel create a downtime?

I inherited a cisco ASA, I never really had to manage one before. But, I need to modify an existing tunnel to add IP addresses to both the local and remote traffic selector, specifically there are ...
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1answer
42 views

What are the benefits of using MP-BGP multicast address family, under the context of inter PIM domains multicasting?

Under the context of inter PIM domains multicasting, 1 RP on each PIM domain (2 domains), attached with eBGP, with MSDP peering to exchange the actives sources, what are the benefits of using the MB-...
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0answers
23 views

Cisco FTD DHCP option codes

I have a Cisco ASA 5515-X that is currently running ASA with the FirePOWER module, which cannot sent option code 60 in the DHCP request. My ISP requires me to send this. Does anyone have FTD 6.4 (or ...
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1answer
119 views

How to configure IP addresses in cisco packet tracer?

Hello I am working with Cisco packet tracer. I have two laptops connected to a wireless router with IP addresses assigned using DHCP. The router's Internet IP address is 10.1.0.0 and the LAN address ...
0
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1answer
32 views

STP Portfast Networks

I have switched network and on all access ports I've configured spanning-tree portfast edge When I enable spanning-tree portfast networks on trunk ports 1/0/51-52 every access port is blocked. Do I ...
2
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1answer
92 views

Accessing HTTP Secure Server on Cisco IOS

I have a Cisco ISR4331/K9 running IOS XE Version 16.09.04 which I have configured with a hostname, domain name, and generated 2048 bit RSA keys on, I have also verified the clock is set correctly. ...
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1answer
38 views

How does a Cisco router determine if a packet is IP routed or label switched?

How does a Cisco Router (IOS-XE) decide if a Packet will be MPLS Label switched or ip routed? In a Juniper MX MPLS Pathes have an own Administrative Distance (or Preference in Junipers wordings) So ...
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2answers
43 views

BGP Cisco best practices to filter client asn and prefixes

I have two bgp routers. OSPF as IGP and on Loopback's iBGP. Both routers have different peers, but both receive full routing table. I have to connect client through BGP and give him full table. Client ...
0
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1answer
29 views

BGP Cisco internal and external distance

I have two bgp routers. OSPF as IGP and on Loopback's iBGP. Both routers have different peers, but both receive full routing table. In google I found on many presantations "bgp best practisec&...
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1answer
25 views

Ikev2 ipsec issue between Asa and sonicwall (issue resolved) but need understanding

Really need your help Need help in understanding an issue faced when creating a tunnel between Asa and Sonicwall (Issue got resolved) still need help to understand. SonicWall: Phase 1 Ikev2 Encryption ...
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2answers
261 views

Cisco 2960x Stack IOS version mismatch

Hope some of you already have some hands-on experience with that - if you're adding a new switch to the stack and you get IOS version mismatch, can you still copy the bin image from the master to the ...
1
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1answer
42 views

Is it possible to configure DHCP on a router or UTM firewall for the multiple VLANs on L3 Switch?

I'm working on expanding our office network to accommodate more users/devices. Currently we have the DHCP configured on a UTM firewall(cyberoam ing50) device(cum router) providing IP addresses for ...

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