Cisco WAN :: 3945 - Local Route Eliminates Multicast PHANTOM RP
Nov 4, 2012
i have a problem regarding multicast bidir redudency RP. as we know the redudency RP with bidir is created by the PHNTOM RP-
"The preferred method for providing Bidir rendezvous point redundancy can be designed using
loopback networks with different mask length . This mechanism relies on unicast routing longest
match route lookups to guaranteea consistent path to the rendezvous point"
in the new IOS image (I.E router 3945), when we create a loopback, the router will install L route (which is host /32 route).
beacause of the /32 route the PHANTOM RP can not work properly.
=====================================R1_BACKUP_RP# interface Loopback2 description RP_address ip address X.X.200.1 255.255.255.0 ip pim sparse-mode
R1_BACKUP_RP#sh ip route L x.x.200.1/32 is directly connected, GigabitEthernet0/1=====================================
the x.x.200.1/32 address is the ip of the master RP but beacuse of that L route
the pim can creat the shrade tree as it should.
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Jan 29, 2012
[URL]
We found out that only local multicast ip address range is not passing between the sites, any other range is passing, local range is 239.0.0.0 and above.
We have two different datacenters, the internal switch is 2960S (Stacked) with 1-10 vlans and the external switch is 3560E, the external switch is adding another tag (qinq, dot1q), vlan 611, and send the packets to metro line to the other site.
on the other site we have the same configuration.
internal switch from site A is configured with igmp querier and the internal switch port on site B connected to the external switch is configured as mrotuer port.
multicast and igmp is passig between the sites, but the local multicast range is not passing, igmp filterring is configured on all port but no profile is defined and no ports are filterred, on the external switch igmp snooping is disabled.
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Oct 7, 2011
I'm trying to have a website name: remote.test.com route to a local IP address but can't seem to get it working with this router. I don't want to use the windows hosts file as there are different Operating Systems that will connect and so routing though this D-Link is the only option. I have my wireless router connected to a separate network switch though it's WAN port where other computers sit as well as the target machine. I can use the internet as normal like this so things are working fine.
[code]...
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Jul 12, 2012
I have to connect through VPN for work so that I can RDP into my remote development machine, but their internet speed is painfully slow. Is there any way I can route my general internet browsing traffic through my local connection, while still maintaining the VPN connection to my remote box?
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Dec 1, 2012
Region : Argentina
Model : TL-WR741ND
Hardware Version : V4
Firmware Version : 3.13.12
ISP : Triple C
I'm trying to set up my new WR741ND router to replace the old WR541G with excctly the same cabling,ISP account etc.
All seem to be working i.e. I get the PPPoE connection against the ISP and cat ping by name to Internet addresses from THE ROUTER.Also I get DHCP handing out addresses both to my desktop connection by Ethernet cable and to my laptop via Wifi.And the computers may ping the router and also connect its admin GUI.However,the computers stop at the router and can't go further.All they can go is to the router as if it doesn't route between LAN and WAN.With the 541 router everything works and as I said it has the same setup (very basic,no static routes or anything too smart).
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Apr 18, 2012
Why do we need MP-BGP (and not BGP) to exchange multicast prefixes between multicast domains?
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Feb 19, 2013
I try to pass multicast traffic between two vrf on the same 3750 switch. I have IP services IOS and sdm template routing.
here is my config:
ip routing
!
ip vrf vpn2
rd 1:1
mdt default 232.1.1.1
route-target export 1:1
route-target import 1:1
[code]....
Now I'm stuck - I don't know what to do to pass multicast traffic. Do I have any chance to run this config on 3750 chassis?Perhaps "Configuring Multicast VPN Extranet Support" document will be useful, but it concerns Catalyst 6500? [URL]
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Jun 24, 2011
I've enabled antispoof on all interfaces on asa 5510.If you start a traceroute to a network on the default route, everything works, since replies comes to an interface with route 0.0.0.0/0 defined.If you start a tracer route to a network that is NOT on the default route (let's assume coporate MPLS), you only get response from first carrier router, the other are discarded because of anti spoof violation.
I have ICMP inspection and icmp-error inspection enabled.
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Apr 22, 2012
i'm trying to setup a local DNS server to manage small office local-only domain names for our servers. i have the DNS working properly (resolving local machines and using the ISP dns if it can't). so i put the DNS server ip into the "Static DNS 1" field of the router settings. the other 2 static dns fields are empty.the problem is that the router is still using the ISP dns server as the primary and my local dns server as the secondary. i verify this in two places. first, if i go to the "status" tab, DNS 1 shows the ISP server while DNS 2 shows my local DNS server. secondly, if i connect to the wireless device with a linux-based machine, the /etc/resolv.conf file shows the nameserver ips in the same incorrect order.
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Nov 8, 2012
I am trying to find out what the 'normal' operating temperature of the CPU in a 3945 router is? We have just replaced some 2800 routers for 3945's and the NMS server initially complained about the new router CPU temperature being too high. Compared to the 2800 the CPU temperature is much hotter - 50 degrees celcius as opposed to 20-smothing degrees. I have searched but can't find what are considered 'normal'?
This is the output:
router#sho environment allSYSTEM POWER SUPPLY STATUS==========================Internal Power Supply 1 Type: DCInternal Power Supply 1 12V Output Status: Normal
[Code].....
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Mar 3, 2013
We have recentrly replaced a 1700 router with Cisco 3945 router (Core Router) and the Channalised E1 interface is configured as given below: [code]
The issue happens intermittenly and makes network not reahable.Status of the links are UP/UP - No traffic forwarded through the link (Ser 0/0/0:1 and Ser 0/0/0:2) and at the same time not able to ping the local IP Address as well - 10.5.10.1/10.7.10.1.No issue on the Ser 0/0/0:0 link - Working fine.If you replace the new router with the old one all are working fine.
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Apr 12, 2013
Our company have purchase new cisco 3945 and install SM ES3G-24-P.
Etherswitch already configure and can access service module. But assigned VLAN in a port and and ping the host connected on is RTO from the router.
Do i need to upgrade the IOS of the chassis so that the SM installed be detect as ordinary GE port?
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Jan 7, 2013
How to find the maximum number of PRIs supported on a given router:
Let's say I need to find maximum number of PRIs I can connect on a C3945.
I see that I could buy for example (4) VWIC3-4MFT-T1/E1. The C3945 comes with (4) EHWICs where such VWIC3-4MFT-T1/E1 cards can be inserted. Since each VWIC3 has (4) ports each, that would be total of 16 PRIs.
Then let's say I want to put more Service Modules and allow me to expand it further. The C3945 can support up to (4) service modules.
If I want to put the maximum number of PRIs possible, is it right I could install (4) NM-8CE1T1-PRI. That would give me maximum of 48 PRIs in a C3945.
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Dec 27, 2011
I wanted to confirm if the NM-2W is compatible with 3845 (says it is compatible) and 3945.I wanted increase WIC density in these routers to install ISDN HWIC-4B-S/T 4-port ISDN BRI High-Speed WAN Interface Card.However, i am not sure if these cards are compatible on the NM-2W. Is there any other NM* module that can extend WIC density on those routers.
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Feb 13, 2012
I have 2 Cisco routers 3945. Use HSRP for links failover. Does exist any possibility (any protocol) which makes routers configuration's automatic synchronization (as failover for ASA firewalls)? I mean, if I will make any configuration changes on the Active router, automticly will taken this changes by the Standby router.
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Sep 3, 2011
Transceiver integration within Cisco 3945.I need to supervise the DOM (Digital optical monitoring) capability of LX laser integrated within CISCO 3945.But after study of the Cisco DataSheet on transceiver module compatibility:
[URL]
I've seen that the SFP-GE-L model which supports DOM cannot be integrated within Cisco 3945.As specified in the datasheet, the only model of LX lasers compliant with CISCO 3945 is GLC-LH-SM (without DOM).However, after study of this datasheet, I can see that Cisco propose this Tranceiver model with DOM capability: GLC-LH-SMD But, so far I can't figure out if this model (GLC-LH-SMD) with the DOM capability is supported on Cisco 3945 and can be monitored through monitoring tools? If not, is there an other alternative to supervise the DOM capability with transceiver (LX) to be intergated within Cisco 3925?
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Mar 7, 2012
We want to implement HSRP between two 3945 ISRs:
RouterModelIOSModuleR1Cisco 3945 Integrated Service
Routerc3900-universalk9-mz.SPA.151-1.T.binNME-AIR-WLC12-K9
R2Cisco 3945 Integrated Service
Routerc3900-universalk9-mz.SPA.151-4.M1.binNME-AIR-WLC25-K9
The issue that we are experimenting is that, although the module's interfaces are up and HSRP in correctly configured, the show standby summary displays that the Active router is local in both routers. We also have some GigabitEthernet in the routers and they are correctly running HSRP. Does the WLC Modules physically support HSRP?
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Jan 30, 2012
Does 3945 support nat for SCTP ?
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Mar 29, 2012
I have to replace the 3745 which is our edge router (running (C3745-ADVIPSERVICESK9-M), Version 12.4(23), RELEASE SOFTWARE (fc1)) with (I think) a 3900 (drawing from memory, I haven't actually seen the device yet).In an ideal world, I SHOULD be able to just set term length to "0", do a show run, copy that off to a text file, and then paste it into the new one...
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Nov 10, 2011
I need to upgrade a router from a 2811 to a 3945.
2811 has the following modules:
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Aug 8, 2012
I have a Ethernet module (SM-ES3G-16-P) installed in a 3945 router and noticed during first boot no licenses are active at all. I would assume at a mimimum ipbase would be active. With this module, does static routing work with just ipbase?
Example:
interface g0/1
no switchport
ip addr 192.168.254.2 255.255.255.0
[code]....
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Oct 3, 2012
I have some lags on my 3945 router. From show ip nat statistics there is following output:
BR1#show ip nat statistics
Total active translations: 20 (0 static, 20 dynamic; 20 extended)
Peak translations: 8877, occurred 1w0d ago
Outside interfaces:
GigabitEthernet0/0, GigabitEthernet0/1
[code].....
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Jan 15, 2013
Is Cisco 3945 router support URL based filtering . For example to block website [URL] but not the main site [URL].
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Mar 15, 2012
I reported a really strange issue on a Cisco Router 3945. Here below info about release software used: [code] Please look at a brief extract of router running configuration file: [code] It’s an easy configuration of Extended ACL and the application on an Ethernet interface. The expected result is:
- The interface works properly (because access list is permitting every kind of data traffic in input)
- Checking “show access-list 180”, the counter of matched packets increments for all the packets that are forwarded inside the fa0/0/1.
But actually the Fastethernet 0/0/1 drops all the packets as if all the packets don’t match with access list (And this behavior is really incredible). The interface couldn't be used anymore because any kind of data traffic is denied.
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Mar 12, 2013
Will the 3945 router work on 208 V single phase (line to line)? I know it mentions 100-240 VAC, but would the line-to-line issue cause a problem?
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May 18, 2011
3945 Router IOS Required for support VoFR Feature
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Jul 18, 2011
Was wanting to know if these cards are compatable with the new 3945 ISRs or if their is a unique command that has to be run to recognize these. why I'm using these large routers with a T-1. Its too long of a story.
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Aug 11, 2011
I just got my first 3945 router and E3/T3 Network cards and when I do a sho ver I can see the E3/T3 card but when I do a show run all I see are the 3 GE interfaces.
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Aug 9, 2011
I am getting the following message from a 3945 router: %CERM-4-TX_BW_LIMIT: Maximum Tx Bandwidth limit of 85000 Kbps reached for Crypto functionality with securityk9 technology package license.
That router has 8 Gre/IPsec tunnels and one of those tunnels is 100Mbps.The question is, could I get 100Mbps as the sum of all tunnels, or is there a restriction to 85Mbps ??
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Jan 20, 2013
I have an issue understanding the difference between 3945 and 3945E from VPN support perspective.
If you check this link here:
[URL]
You will see that the 3945E doesn't even have an ISM slot for a VPN ISM module and of course I could not find any ISM module for 3945E (I think this is obvious). Nevertheless, the above mentioned page and
[URL]
say "Embedded hardware-accelerated VPN encryption for secure connectivity" for 3945E
That the Cisco 3945E supports the same VPN features (including packet encryption / decryption in hardware) like a Cisco 3945 with VPN ISM card?
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Dec 21, 2012
When I try to configure a voice port (like voice-port 0/0/0:15) after doing a conf t, it gives me an error of invalid input detected.We are using a Cisco 3945. We have successfully setup 3825 and 2851 in the past.
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May 1, 2013
I have a 3945 router with two interfaces connected to my firewall, one to the management interface and another to my dmz. I'm running eigrp between all my network devices. The problem I'm running into is when I try to ssh to the management interface of the 3945 the traffice hits the firewall, then goes right to the management interface as it should, but the return traffic is trying to use the dmz interface since that is how the router knows to get back to my computers network. I created 2 route-maps to try and address this issue. [code] I've applied the MANAGE_IN route-map to all interfaces that might have inbound traffic destined for the management network and applied the MANAGE_OUT route-map to the management interface. The MANAGE_IN policy appears to be functioning correctly, the MANAGE_OUT doesn't appear to be functioning correctly. When I look at traffic from my host going to the management interface I see it still trying to return through the dmz interface.
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Aug 4, 2012
connecting a Cisco 3945 Router to an Ethernet WAN Link. The service provider has provided a 100M Ethernet Single Mode Fiber handoff to the customer premises with SC Connector. The CPE configuration proposed for this setup is like this.
Cisco 3945
EHWIC-1GE-SFP-CU (EHWIC 1 port dual mode SFP(100M/1G) or GE(10M/100M/1G)
GLC-FE-100LX 100BASE-LX SFP for FE port.
Since the SFP has LC Connector, i suppose i need to have an SC-LC Cable for connecting the Ethernet link. Do i need anything else, apart from above?
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