The interface VLAN ACL of inbound traffic?
Hi, I may be over thinking this, but I have an ACL that is applied when entering an interface vlan. I have a line to allow udp any any newspaper which is temporary. I see hits, but the source ip address is outside the network to the ip address of the destination interface vlan. I expect to see ip source addresses only in the range of ip addresses of 192.168.1.128/25. What do you think? Thank you
Interface vlan 100
IP 192.168.1.132 255.255.255.128
IP access-group ACL_IN in
Hit of the ACL
% S: SW1-6-IPACCESSLOGP: list of the allowed ACL_IN 192.168.6.100 (137) udp-> 192.168.1.132 (137), 1 packet
Hello
That looks like to me WINS navigation, a response packet.
And as MS navigation works at level 2, it sends a response to the IP of the router where he sees demand for travel coming - maybe your customers have a configured WINS server address?
Do not forget
allow udp any any newspaper
will match ANY ip src, not only your local subnet and is why your journal entries show the traffic in both directions.
Rgds
Ian
Tags: Cisco Security
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config-file-header
MYSTICSW1
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@
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output
Default IP gateway 192.168.1.1Thanks in advance!
Clint Lambert
Clint, please see this post
https://supportforums.Cisco.com/message/4178990#4178990
-Tom
Please mark replied messages useful
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Based on the information contained in the user guide, it seems that it cannot apply to the physical interface.
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Assign IP address to the Interface VLAN of Web Admin?
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Definition of VLAN ACL blocks all traffic inside of the vlan
Hello
I test a 7024 PowerConnect switch, do some VLAN and want to test the traffic between 2 PC connection to the vlan by default. So I put a PC on Port 1 and the other on Port 2.
I am applying only a permit ICMP any any rule on this vlan. This implies a refusal rule everything.
But now I can't ssh from one PC to another?
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Lockout Ganymede, define the interface VLAN bad
Hello
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If you are not able to access the switch, simply do a recovery of password for the switch. you would be able to access the switch and change the configuration.
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Hi all
I'm having some trouble getting the ACL work they way I want. I have a lot of clients in differnet VLAN (vlan 6-10) and my ASA (10.1.99.254) on vlan 99 for internet access. I need VLAN 6-10, to have access to the ASA for internet, but VLAN 6-10 should not have access to the other. For the moment, I do apply the access group of rules in the directon out on the vlan 6 SVI.
VLAN 6-10.2.1.0/24
VLAN 7-10.2.2.0/24
VLAN 8-10.2.3.0/24
VLAN 9-10.2.4.0/24
I tried
10 permit ip 10.1.99.254 0.0.0.255 10.2.0.0 0.0.255.255
20. denying a whole
I could do a ping of the ASA and made was not able to access the other vlan. However, I also don't no matter what internet access. DNS responses are not passed without traffic ICMP passed the ASA.
The switch is a 3560G
Any help would be appreciated.
Robert
The acl should not prevent the devices in the same vlan talk to each other, it will stop devices outside of this vlan only so what you see is not good.
Regarding your general question, usually you use inbound ACL on the source rather than outgoing ACL on the destination VLAN vlan. You can use either but blocking the packets at the source is the most common approach.
So if I understand correctly, you need to block all traffic between any vlan 10.2.x.x/24 subnet?
If so and you are not bothered on the specification of the source IP subnet in each acl.
extended IP access list
deny ip any 10.2.0.0 0.0.255.255
allow an ip
int vlan 10
IP access-group to
So let's say vlan 10 is 10.2.5.0/24. What the foregoing, block any package from clients in the vlan 10 with a IP address of destination of 10.2.x.x. All other packets will be allowed. This same acl could apply to all L3 10.2.x.x VLAN interfaces.
Note that, in the acl, I used the source of everything rather than "10.2.5.0 0.0.0.255. This is because with 'all' the same acl could be applied to all the 10.2.x.x VLAN entering without any modification. You can if you want to be more specific to a specific acl for each vlan that is to say. for the same example above.
extended IP access list
deny ip 10.2.5.0 0.0.0.255 10.2.0.0 0.0.255.255
IP 10.2.5.0 allow 0.0.0.255 any
It would be more specific and would stop to any client no 10.2.5.x on this vlan to send packets, but most of communication would not work in all cases that the return should not would be routed packets properly to the customer. But like I said this makes the unique acl to the vlan specific so you would need different ACLs by vlan.
A few additional points-
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(2) customers will not be able to ping to their default gateway, that is to say the interface vlan L3. This isn't a problem because the destination IP address is never usually the interface vlan L3, but if you want to be able to do you need an online permit before the line to refuse. Also note that this means that your acl would be different for each vlan, IP because of the vlan L3 is different by vlan
(3) If you use the same real acl for each interface vlan all hits on the acl will be for all the VLANS so you will not be able to see visits by vlan. This may or may not be important to you. Often, this is why you see unique ACL (in terms of number or name but not necessarily input) use. If you do not want to see the visits by vlan and then simply to reproduce the acl, but with a new name by acl (assuming that you go with the ability to use 'everything' in your ACL).
Hope all that makes sense. Doubts please ask for more.
Jon
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And the output of your base layer diverter: -.
show ip route<>
HTH >
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Interface VLAN SG300-28 Firmware 1.3.7.18
Hello
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minh06,
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SG300/SG500 remove interface vlan
Hello!
The question is the following:
I add a VLAN interface to test IP connectivity to this vlan by adding an IP address for this interface vlan and ping on a host.
for example
interface vlan 5
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Even when I delete the vlan itself of the database for vlan. There is no command "no interface vlan. I can only stop the interface vlan.
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Thanks, Woeger
Hello
I tried just that with my switch from laboratory here.
I created VLAN 10 and he has given an IP address.
Then I did a no ip address on the interface VLAN and then not a vlan 10.
At this stage there is no interface THAT VLAN 10 in my config running or when I do a show ip interface.
So remove the VLAN has done actually remove the interface for me, brings me to my question.
What version of the bootcode/firmware do you currently use? Maybe this problem has been fixed, because I am running 1.3.7.18 firmware with 1.3.7.01 code to boot.
If you are on a low moving forward and put to date, don't forget to upgrade the boot thus code, it is necessary for new versions of firmware.
Hope that help, but if not just let me know and we can take another look,
Christopher Ebert - Advanced Network Support Engineer
Cisco Small Business Support Center
* Please note the useful messages *.
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All traffic Vlan to the Interface of the Proxy Server
Hello!
I need little help to route all the traffic on VLAN to the proxy server.
I have different VLANS on switches L2 200-26 and by 300-28-L3 for routing.
I have already created VLANs and able to rout them, but facing problem for routing traffic to the interface proxy for internet access.
I have different VLAN for example Vlan 10, 10.10.10.0/24 sales, Vlan20 10.10.20.0/24 Marketing. I have trunk between switches interfaces and default 1U is the same on all switches.
My proxy server has two NICs, one is connected to a dsl modem and other one to the switch port that uses the IP 192.168.0.2 to default vlan1.
I am able to surf the internet using vlan1 but not on ther VLAN.
I put the route defaults to the switch of 192.168.0.2, but don't not routing for internet to another VLAN.
Thank you
Hello
To answer your questions:
1. I have to update the following files?
https://software.Cisco.com/download/release.html?mdfid=283019617&release...
Yes, please let me know what firmware and boot code, that you have right now and I'll tell you what is the best way for you to upgrade because you shouldn't go straight to the latest firmware unless you run already 1.3.5.58 or later version.
2. it supports to 8 dhcp pools. I have swimming pools, but I have more than 8 VLAN. I put all the settings, works very well.
You are right and I forgot to mention the limitation of only 8 DHCP pools, I'm sorry. That being said, make sure that your current DHCP server uses IP addresses assigned to each VLAN on the switch as the gateway by default for the VLAN respective.
3 for the Proxy Server, I need to find a way to point back roads of VLAN to vlan mapping static address on the switch. I'm confused in this little piece.
I understand that this can be confusing, let me see if I can explain it a little better.
Assuming that everything on the switch is configured according to my recommendations can
1. you need a single, a route by default on the switch, so that when a PC is connected to one of VLAN on she tries to go online, an unknown IP address to the switch, it will send it to the Ip address of the router, because the proxy server will be able to reach this IP public, unknown to any Web site.
2 - when the traffic is back to this Web site, it will be intended for another subnet that the proxy server is on. Suppose the answer is looking for 10.10.10.100 (subnet unknown to the proxy server), without a static route on the proxy server it say where to send this traffic, packets are simply deleted.
3. you need to create as many static routes on the proxy server as the amount of VIRTUAL LANs, you have on your network.
For now I know that the proxy server is 192.168.0.2 on VLAN 1 but I don't know what the IP address of the switch is on the same VLAN, it should be something on the 192.168.0.x range.
All journeys should look like this:
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10.10.20.1 255.255.255.0 send 192.168.0.x (IP address of the switch on the VLAN 1)
Alternatively, if all your internal VIRTUAL local networks are on the beach of 10.10.x.x then you should be able to create a single rule to summarize all the VLAN as this:
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Please let me know if it was a little clearer.
Feel free to ask any questions.
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interface GigabitEthernet0/1
Description ES_LAN, ETH - LAN$ $$
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IP virtual-reassembly
automatic duplex
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!
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local IP http authentication
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Default route is defined...
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I want to continue to have access to the guest VLAN in VLAN private to allow the management of points of access etc.
I want to allow internet access as guest newtork but block it to access my private network.
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Hello Chris,
> From this point of view should I leave the above lines and create another list acl for the 10.3.1.0 of the network and apply entering gig0/1.1?
I would go this way, as in a simple ACL, you can't express your needs. The ACL to apply on gi0/1.1 will probably need further instructions then the ones I suggested, but divide the problem into smaller manageable pieces is a good strategy.
> Also with this config would be NAT be performed on each network by making this change?
Until the internal network and network of comments are on the same side (ip nat inside) there is no NAT triggered in communication between them so that you should not influence the NAT configuration with this change.
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Interface VLAN traffic information
Hi all
Could someone please advice what traffic demonstrated Interface VLAN?
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If I monitor the traffic of 10 to VLAN, the two interfaces combined traffic statistics?
Thank you
Prasanna Kumar deully
Oh sorry I thought you meant span monitor where you register the interface traffic combined with the terms of a vlan
To answer your question, it will display the number of ip layer 3 traffic in packets to all interfaces grouped under the vlan, then Yes, the two interfaces will show the interface of layer 3 vlan, some platforms will also show some L2 information like below and its shows 30 sec count on VLAN interfaces, but number five on the physical interface FA0/1
Vlan149 is up, line protocol is up
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MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
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Last entry of 00:00:14, exit ever, blocking of output never
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Strategy of queues: fifo
Output queue: 0/40 (size/max)
30 second entry rate 2134000 bps, 381 packets/s
exit rate of 30 seconds 2019000 bps, 460 packets/s
L2 switching: ucast: 30595061 pkt, 2268569227 bytes - mcast: 0 pkt, 0 bytes
L3 in Switched: ucast: 5882988002 pkt, 1908218042989 bytes - mcast: 1623 pkt, 775020 bytes
L3 on Switched: ucast: 5579358870 pkt, 1872959920772 bytes - mcast: 322 pkt, 138259 bytes
5886751734 packets input, 1885010127367 bytes, 0 no buffer
Received 0 emissions (28 of IP multicasts)
0 Runts, 0 giants, 0 shifters
entry 0, 0 CRC errors, frame 0, saturation 0, 0 ignored
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0 output errors, 0 interface resets
output buffer, the output buffers 0 permuted 0 failures -
Install ESXi on the same VLAN as VM traffic
I know it is advisable to separate your network management, but in this case we do not have a VLAN additional to devote to this.
What to look out for when you use the same VLAN to install ESXi (network management) like some of my virtual machines?
Also, I downloaded ESXi installable 4.1; I still need the local disks on my correct server install?
The reason of VLAN in your example would be more for safety. Using a separate physical NIC for different traffic (management, vmotion, etc.) is more about performance, although a separate network offers security. If all goes well in your network design, you create a secure network that isolates the management and storage of regular network traffic traffic.
ESXi can be installed directly on a USB flash drive. It's a support install destination from the installation CD.
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Dear Sir
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! Description of the system "M4100 - 24 G - POE + ProSafe 24 port Gigabit L2 + Managed Switch w ith PoE +, 10.0.2.13, B1.0.1.1"
! Version of the software system "10.0.2.13".
! System Up Time "28 days 22 hours 39 minutes 58 seconds"
! Other packets QOS, IPv6, routing
! Current SNTP synchronized time: SNTP last attempt status is not successful
!
database of VLAN
VLAN 99 200-208 455-456 999
VLAN 99 name 'TEST '.
name of VLAN 200 'Clients '.
name of VLAN 201 "Telefonie.
name of VLAN 202 "guest."
name of VLAN 203 'fr '.
the name of VLAN 204 "TD."
VLAN name 205 "DMZ".
VLAN name 206 'printers '.
VLAN name 207 'media '.
VLAN 208 name 'Wireless '.
VLAN name 999 "3com".
VLAN 1 1 routing
-Other - or ITU (q)
VLAN 200 2 routing
VLAN 201 3 routing
VLAN routing 202 4
VLAN routing 5 203
VLAN routing 204 6
VLAN routing 205 7
VLAN routing 206 8
VLAN routing 9 207
VLAN routing 10 208
VLAN routing 11 455
VLAN routing 12 456
VLAN routing 99 13
outputnetwork mgmt_vlan 203
IP http secure server
Configure
time range
default IP gateway - 10.253.255.1
level of 483f42190380e8780a9d32a3c63d31b86d6ad49b870db8306af86a9ce3e06cd9a39f66e666e86f0aaab777b0ab9fe571908247c31d904463d1a0767400f8e763 user name 'admin' password encrypted 15
level password user name "secit" encrypted 15 912ba98d721224814ea15db6dec1701819e75dfcafa635831e9eab148c105c20ba85dc61882dd47a65eb66dff6cf0005a1a2232b6957ec898cd6187c6bdbb510
line console
output
-Other - or ITU (q)line telnet
outputssh line
outputspanning tree bpduguard
!
IP access-list ACL_Wizard_IPv4_0
outputIP access-list Deny_Guest_Intervlan_Routing
deny ip 10.253.2.0 0.0.0.255 10.253.0.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.1.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.3.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.4.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.5.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.6.0 0.0.0.255
-Other - or ITU (q)
deny ip 10.253.2.0 0.0.0.255 10.253.7.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.8.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.9.0 0.0.0.255
deny ip 10.253.2.0 0.0.0.255 10.253.11.0 0.0.0.255
IP 10.253.2.0 allow 0.0.0.255 0.0.0.0 0.0.0.0
outputclass-map correspondence ClassVoiceVLAN ipv4
game of vlan 201
outputPolicy-map PolicyVoiceVLAN in
class ClassVoiceVLAN
Assign-queue 3
outputoutput
interface 0/1
Description "ACCESSPORTS.
participation of VLAN include 200-201
VLAN tagging 201
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outputinterface 0/2
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 1000000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
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policy - PolicyVoiceVLAN
bandwidth 100000
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participation of VLAN include 200-201 204
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policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
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policy - PolicyVoiceVLAN
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pvid VLAN 203
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participation of VLAN include 200-201
VLAN tagging 201
output0/8 interface
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policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/9
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policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
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participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/10
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/11
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
-Other - or ITU (q)
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/12
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/13
VLAN 201 votes
policy - PolicyVoiceVLAN
-Other - or ITU (q)
bandwidth 100000
pvid VLAN 200
VLAN automatic participation 1
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/14
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
VLAN automatic participation 1
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
output-Other - or ITU (q)
interface 0/15
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
VLAN automatic participation 1
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/16
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 202
VLAN automatic participation 1
participation of VLAN include 201-202
VLAN tagging 201
IP mtu 1500
output
-Other - or ITU (q)interface 0/17
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 200
participation of VLAN include 200-201
VLAN tagging 201
IP mtu 1500
outputinterface 0/18
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 203
participation of VLAN include 200-201 203
VLAN tagging 201
IP mtu 1500
-Other - or ITU (q)
outputinterface 0/19
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 206
VLAN automatic participation 1
participation of VLAN include 201 206
VLAN tagging 201
IP mtu 1500
outputinterface 0/20
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 999
participation of VLAN include 200-201 204-207 455-456 999
-Other - or ITU (q)
VLAN tagging 200-201 204-207 455-456
IP mtu 1500
outputinterface 0/21
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
pvid VLAN 455
VLAN automatic participation 1
participation of VLAN include 200-204 455-456
VLAN tagging 200-204
IP mtu 1500
outputinterface 0/22
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
-Other - or ITU (q)
switchport mode trunk
switchport trunk vlan native 456
pvid VLAN 456
VLAN automatic participation 1
participation of VLAN include 200-204 456
VLAN tagging 200-204
IP mtu 1500
outputinterface 0/23
VLAN 201 votes
policy - PolicyVoiceVLAN
bandwidth 100000
switchport mode trunk
switchport trunk vlan native 456
pvid VLAN 456
participation of VLAN include 200-204 456
VLAN tagging 200-204
IP mtu 1500
output-Other - or ITU (q)
interface 0/24
bandwidth 100000
switchport mode trunk
switchport trunk vlan native 999
pvid VLAN 999
participation of VLAN include 200-208 455-456 999
VLAN tagging 200-207 455-456
IP mtu 1500
outputinterface vlan 1
Routing
DHCP IP address
outputinterface vlan 200
Routing
-Other - or ITU (q)
IP 10.253.0.1 255.255.255.0
outputinterface vlan 201
Routing
IP 10.253.1.1 255.255.255.0
outputinterface vlan 202
Routing
IP 10.253.2.1 255.255.255.0
IP access-group Deny_Guest_Intervlan_Routing vlan 202 in
outputinterface vlan 203
Routing
IP 10.253.3.1 255.255.255.0
output
-Other - or ITU (q)interface vlan 204
Routing
IP 10.253.4.1 255.255.255.0
outputinterface vlan 205
Routing
IP 10.253.5.1 255.255.255.0
outputinterface vlan 206
Routing
IP 10.253.6.1 255.255.255.0
output-Other - or ITU (q)
interface vlan 207
Routing
IP 10.253.7.1 255.255.255.0
outputinterface vlan 208
Routing
IP 10.253.8.1 255.255.255.0
outputinterface vlan 455
Routing
IP 10.253.255.2 255.255.255.0
outputinterface vlan 456
-Other - or ITU (q)
Routing
IP 10.253.11.1 255.255.255.0
outputinterface vlan 99
Routing
IP 10.253.9.1 255.255.255.0
outputIP management vlan 203
dhcp service
pool IP dhcp "Telefonie.
Rental 7 0 0
Server DNS 8.8.8.8 8.8.4.4
router by default - 10.253.1.1
Network 10.253.1.0 255.255.255.0
domain secit.be
b-node NetBIOS node type
output-Other - or ITU (q)
pool IP dhcp "guest."
Rental 0 12 0
Server DNS 8.8.8.8 8.8.4.4
router by default - 10.253.2.1
Network 10.253.2.0 255.255.255.0
secit domain name - guest.be
b-node NetBIOS node type
outputpool IP dhcp 'media '.
Rental 0 12 0
10.253.3.2 DNS Server 8.8.4.4
router by default - 10.253.7.1
Network 10.253.7.0 255.255.255.0
secit domain name - media.be
b-node NetBIOS node type
outputpool IP dhcp "TD."
Rental 0 14 0
10.253.3.2 DNS Server 8.8.4.4
router by default - 10.253.4.1
Network 10.253.4.0 255.255.255.0
-Other - or ITU (q)
secit domain name - td.be
b-node NetBIOS node type
outputpool IP dhcp "internal."
Rental 7 0 0
10.253.3.2 DNS server
router by default - 10.253.0.1
Network 10.253.0.0 255.255.255.0
domain fixitsolutions.local
b-node NetBIOS node type
outputoutput
Maybe it's the DHCP packet filtering.
For help, try to add a rule to allow DHCP packets.
Example: (this is obviously NOT the exact rule to filter only the DHCP packets, but just a simple rule for the test)
IP access-list Deny_Guest_Intervlan_Routing
permit udp 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 eq 67
permit udp 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 eq 68
deny ip 10.253.2.0 0.0.0.255 10.253.0.0 0.0.255.255
IP 10.253.2.0 allow 0.0.0.255 0.0.0.0 0.0.0.0
outputIf this ACL works (you can get the DHCP address), then you will need to write the ACL right, something like (this is just an example):
IP access-list Deny_Guest_Intervlan_Routing
! DHCPDISCOVER
permit udp 0.0.0.0 0.0.0.0 eq 68 255.255.255.255 0.0.0.0 eq 67
! DHCPOFFER
0.0.0.0 eq 67 255.255.255.255 0.0.0.0 eq 68
! DHCPINFORM
permit udp 10.253.2.0 0.0.0.255 eq 68 255.255.255.255 0.0.0.0 eq 67
! DHCPACK
0.0.0.0 eq 68
permit udp 10.253.2.0 0.0.0.255 eq 67 255.255.255.255 0.0.0.0 eq 68
! Internal traffic
deny ip 10.253.2.0 0.0.0.255 10.253.0.0 0.0.255.255
! Internet traffic
IP 10.253.2.0 allow 0.0.0.255 0.0.0.0 0.0.0.0
output
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