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Figure 8 Interface Card Slot Locations on Cisco 2911 Note To install double-wide interface cards in Cisco 2911, remove the slot divider. When the slot dividers are removed, slot 0 and slot 1 become slot 1, and slot 2 and slot 3 become slot 3. Figure 9 Interface Card Slot Locations on Cisco 2921 and 2951. Product Code Cisco 2911/K9 Rack Units 2RU Interfaces 3 integrated 10/100/1000 Ethernet ports (RJ-45 only) Expansion Slot(s) 1 service module slot 1 Internal Service Module slot 2 onboard digital signal processor (DSP) slots 4 enhanced high-speed WAN interface card slots RAM 512 MB (installed) / 2 GB (max) Flash Memory 256 MB (installed) / 8 GB (max) Dimensions 43.8 cm x 30.5 cm x 8.9 cm Package Weight 16.15 Kg. EHWIC-1GE-SFP-CU Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU EHWIC-4ESG Four port 10/100/1000 Base-TXGigabit Ethernet switch interface card for Cisco1900 2900 3900Routers ISM-SRE-300-K9 Internal Services Module (ISM) with Services Ready Engine.

Cisco WAN :: 2911 - Installing 4G Wireless Card (EHWIC-4G-LTE-V)

We're installing a 4G wireless card (EHWIC-4G-LTE-V) in our 2911 for the first time. Upon boot-up, the IOS doesn't recognize the card (the 'show inv' command doesn't list it at all). Do I need to give a command or have a certain IOS version in order for it to be recognized?

Cisco Switching/Routing :: Enabling EHWIC Card Into 2911?

I have installed a EHWIC-4ESG card into my 2911 router running IOS Ver 15.1(4)M2. When I do a show diag, I can see the card, but I get the following line 'Could not get card instance pa_bay=0 slot=0.' Am I missing a step, do I have change something, is it not compatible (all that I have read, states that is)

Cisco Switching/Routing :: Configuration EHWIC-3G-HSPA-U Card On 2911

How I configurate EHWIC-3G-HSPA+7 card on 2911.

Cisco WAN :: Can Populate All 4 EHWIC Slots In 2911 Router With VWIC3-4MFT-T1/E1 Cards

Can I populate all 4 EHWIC slots in a Cisco 2911 router with VWIC3-4MFT-T1/E1 cards supporting clear channel T1 data traffic?Or do I need a higher performance router inthe 3900 series to do this?The data sheets lead me to the conclusion that I can but I just want to validate this.

Cisco WAN :: Configured New 2911 Router With HWIC-2T

We have configured new 2911 router with HWIC-2T with it.However we are seeing serial interfaces up, but can hardly ping other end. Again we are seeing a lot of CRC errors on serial interface.
But if we connected same cable, with other old router 2811, it works fine. Confiuration is same on both the routers. [code]

Cisco WAN :: Configuring HWIC-8A On 2911 Router?

I had purchased a HWIC-8A in an effort to provide terminal server capabilities into multiple routers. I had found a document that I thought would take me through the configuration but it doesn't appear that the command syntax is the same on the 2911's as it is in the document. Does any know how I would need to get this configured on the 2911 router?
Here is the document I was referencing
[URL]

Cisco WAN :: Which Type Of HWIC Card Should Use In 2911-sec / K9 Router

I have cisco 2611 + NM1E , and i want to trade in for a cisco 2911 security router + HWIC4 Card.Which type of HWIC card should i use in the cisco2911-sec/k9 router?

Cisco WAN :: 2911 - Need PVDM When Use HWIC-2CE1T1-PRI For Leased Line

We plan migrate an old existing WAN architecture based on legacy data serial links. These links will be consolidated on a E1 channalized card.
My question :
Is the HWIC-2CE1T1-PRI need a PDVM DSP ressources on router to oparate for data leased lines or no?
The VWIC3-1MFT-T1/E1 will be used for the backup dial in ISDN connexions? this type of cards a PVDM DSP ressources for data connexions or no?
ISR router are 2911.

Cisco WAN :: Configuring HWIC-2SHDSL Card In A 2911 For CO Mode Operation?

I am trying to configure a shdsl port on a 2911 router for CO mode of operation.The dsl-group auto command does not seem to change the port to operate in CO mode and the link will not come up to a remote router that has a card installed operating in CPE mode.The configuration I have applied for the shdsl controller is.
controller SHDSL 0/1/0
dsl-group auto
!
!
Do I need to use a HWIC-4SHDSL card for the CO mode operation?

Cisco WAN :: 3825 Installed DSU / CSU Part Number HWIC-1DSU-T1 In Router / Doesn't Recognize

I have a 3825 router running 12.4t IOS. I installed DSU/CSU part number HWIC-1DSU-T1 in the router and it does not recognize it. Is this the right card for this router? Is there anything I can look at to determine the issue? I think the router only has 32M RAM. Below is a show hardware. Card is still currently installed.

Cisco Switching/Routing :: 2911 SFP Interface Number

I am configuring my first 2911 using a SFP card but I dont know the interface name for this module.
show inv shows the card..
What is the interface number for this card or if it needs some config before it will recognize the interface?

Cisco :: Translate Called Number Based On Calling Number?

I have some tunnels which terminate to my home router. I'm allowing the other ends of the tunnels to use my voice setup. I need to prepend *67 to all called numbers which don't originate from my house. I don't want people calling my home number based on the caller-id number they see when someone across one of the tunnels calls.
So if 5008 calls 212-333-4444 I want it sent to my provider as *672123334444. If 5001 calls a number, I don't want it touched. Can I do this? I can use IOS or CUCM here.

Cisco WAN :: Difference Between HWIC-1ADSL-M And HWIC-1ADSL?

What is the difference between HWIC-1ADSL-M and HWIC-1ADSL without the '-M'?Can either of the above ADSL cards be used in Cisco 3845 router? We are using HWIC-1ADSL-M in our Cisco 3845 routers everywhere?

Cisco WAN :: L2TP On 1921 With EHWIC

I have an 1921 that I use for L2TPv3 tunnel connection with 2 sides. I need to add others 2 sides and I thought to add an EHWIC-4ESG on my router. Can I configure different xconnections with this module? I would like to configure my router as below: [code]

Cisco WAN :: EHWIC-3G-HSPA+7 Not Supported In Vrf Setups?

we set up a 1941 with c1900-universalk9-mz.SPA.151-4.M3.binand tried to bring up EHWIC-3G-HSPA+7 in the vrf. [code]

Cisco WAN :: Controlling Router Via SMS By EHWIC-3G-HSPA

I need to make some perfomances (like up/down GRE tunnels) on Cisco ISR 2921 by sending SMS. It could be doing by using 3G modem like a Huawei and a server with some expect/SSH-scripts.
But ISR gen.2 has EHWIC-3G modules, which working with GSM networks and they can send/recieve SMS. I think, that it should be an EEM event or some another way to track comming SMS and process it by TCL-script — get a sender number, SMS body and make usefull perfomances on my router (up/down GRE tunnels in my case).
If I done this trick only by using an ISR router and EHWIC-3G module, it will be much more stable scheme in that we dont have extra components (server, modem) potentially may falls.
Unfortunately, there are too low information about configuring this modules (especially, SMS-part) and I dont find usefull for me.

Cisco Infrastructure :: Configuring X2 EHWIC VA-DSL On 2901?

I have two EHWIC VA -DSL cards in a Cisco 2901.
I want each to connect to a separate ISP, one ISP for VOIP, one for Internet. I want to then have a VLAN for VOIP, a VLAN for DATA

Cisco WAN :: 3925 - Unable To Install EHWIC

I am using a Cisco 3925 router and attempting to install an EHWIC card with no luck. The card I am trying to install is EHWIC-D-8ESG.
I have powered down the router, inserted the card into the proper slot and my router doesn't seem to recognize the new card. Is there a command I need to enter to enable the card?

Cisco WAN :: 2921 Router Not Detecting EHWIC-1GE-SFP-CU Card

I just got a brand new Cisco 2951 router that has built-in 3 gigabit interfaces cards. We want to add additonal 2 GE EHWIC-1GE-SFP-CU card to it. When it booted up and type show inventory, it did not detect the presence of the card. There was light on at the back of it. I have checked the compatibility on Cisco. The card is compatible with this router. Do we have to install the card with special instructions in order for the router to see it?

Cisco Wireless :: High CPU On 2921 With EHWIC Card?

I am getting the following error message on a Cisco 2921 as a result of which has a there is 99 % CPU util. This router has the following cards installed and 4G WWAN EHWIC is running 15.1(4) M3 image.
EHWIC_CELL_MSG-1-EHWIC_ERROR_EVENTS: eHWIC Error Event: TxCLK PLL lost lock, HWIC slot 3

Cisco :: EHWIC-4G-LTE-V MIB - Monitor Current RSSI Level?

if there is a MIB available for the EHWIC-4G-LTE-V card that would allow me to monitor the current RSSI level?
If I issue the command 'show cell 0/1/0 radio' on my Cisco2911 router, I get the following info. I'd like to monitor the 'Current RSSI' level in Solarwinds.
Router>show cell 0/1/0 radio
Radio power mode = ON
Current RSSI = -67 dBm
LTE Technology Preference = AUTO
LTE Technology Selected = LTE

Cisco WAN :: Got Error Message From Inserting EHWIC-4ESG In 3925?

see the message '%ESWGE_ERR-3-NIOSII_UP_FAIL: NIOSII fails on 0/3/0 ehwic slot' in 3925 ? we install a new module EHWIC-4ESG in 3925 with ios 15.2.2(T1). 3925 couldn't find the module but got error message above.

Cisco WAN :: 2911/K9 And 2911-Sec/K9 - BOM For Upgrade?

I am having one router CISCO2911/K9 (Cisco 2911 w/3 GE,4 EHWIC,2 DSP,1 SM,256MB CF,512MB DRAM,IPB). But now my management asking me to upgrade this router as CISCO2911-SEC/K9.
What will be the BOM for this up gradation.

Cisco WAN :: EHWIC-3G-HSPA+7 Fail Over Between Two Connections Are Handled By IP SLA Echo And Track

I am having problems with these types of 3G cards(EHWIC-3G-HSPA+7) from Cisco.We are using them on ships where we have a SAT connection and the 3G connection. Fail over between the two connections are handled by an IP SLA echo and a track on the cellular interface, towards an public IP where we have configured a static route to via the Cellular interface.
Once configured the connection comes up fine, the VPN tunnels comes up and all is good.But after some time the connection dies, the track goes down because no data goes through.a sh cell 0/0/0 all however say that the profile is active.

Cisco Switching/Routing :: Any Configuration Guide For EHWIC-4ESW Card

Any configuration guide for EHWIC-4ESW card. Also the difference in configuration between EHWIC-4ESWG and HWIC-4ESW if any?

Cisco Switching/Routing :: 2811 And EHWIC VA DSLA Connection Configuration

I am having trouble setting up a EHWIC-VA-DSL-A= card on my cisco 2811 running the following the following:c2800nm-adventerprosek9-mz.151-4.M2.bin and C2800NM_RM2.srec.124-13r.T11
My hardware supplier tells me its the right adsl card (have 1 existing working card not the same) but the card will not detect on the system to be configured.is this the right card? am I missing something?

Cisco Switching/Routing :: EHWIC-1GE-SFP-CU MPLS Labeled Packets Are Not Being Processed

We have the problem that MPLS labeled packets are not being processed on EHWIC-1GE-SFP-CU if L3PDU + Shim-Header exceeds 1500 bytes.When we move the config exactly to the on-board Interface Gi0/0 it works with put any problems. [code]

Cisco :: Deep Layer Command On These EHWIC Cards To Make Them Flash With Activity?

I have an 8 port Gigabit EHWIC in my Cisco 1921 router. A darn nice little switch module.
However, through my research, I am unable to find if I am able to change the way the NIC lights (green LEDs) on each port function. They basically just stay lit 100% non flashing when connected regardless of the port speed and duplex and ignore flashing for any activity.
Is there a deep layer command on these EHWIC cards to make them flash with activity like full standalone switches? Trust me when you have enough switch ports filled up it does make monitoring your networks health and activity by having the port led's respond to traffic flow. At least in my opinion.

Cisco Switching/Routing :: Configuring 1941 With 8 Port EHWic Switch Module And Onboard GE Ports In Single LAN?

Can you configure a Cisco 1941 to use an 8 port EHWic module and the 2 onboard GE ports in a single LAN?
I've discovered you can't have the on GE ports associated with a VLan, and I'm when I've previously researched for a solution, bridging was mentioned but I cannot seem to get it to work (or completely understand it)The reason I would like to use all 10 ports on for the LAN is becuase I have 10 devices I need to connect to the 1941?

Cisco WAN :: Can't Use Ehwic-3g-hspa-u Card In 2800 Series And 1841 Series Router

why I can't use cisco ehwic-3g-hspa-u card in cisco 2800 series and 1841 series router?documentation said that it should work with that devices but when I installed it, it doesn't work even as device i can't see I am using cisco latest ios advance ent. 15.1(4)M4?

Cisco WAN :: To Add HWIC-2FE With 2821

I have an existing C2821 router (2 onboard GE + 1 HWIC-2FE) currently. Like to add another 1 HWIC-2FE. Saw this doc on Cisco website which states Max of 2 HWIC-2FE for Cisco2821. Want to confirm this is indeed so as another link states max of 1 HWIC-2FE.

Cisco WAN :: Using 3G HWIC On ASR1000

I am looking for a way to use a 3G connexion on ASR1000.Is it possible to install HWIC module of ISR2 in SPA slot or use an USB modem on the RP?

Cisco Switching/Routing :: Configuration EHWIC-3G-HSPA-U Card On 2911

How I configurate EHWIC-3G-HSPA+7 card on 2911.

Cisco WAN :: 2911 - Installing 4G Wireless Card (EHWIC-4G-LTE-V)

We're installing a 4G wireless card (EHWIC-4G-LTE-V) in our 2911 for the first time. Upon boot-up, the IOS doesn't recognize the card (the 'show inv' command doesn't list it at all). Do I need to give a command or have a certain IOS version in order for it to be recognized?

Cisco Switching/Routing :: Enabling SSL-VPN On 2911

after installation of demo versions of 2900-SEC-TEMP & 2911-2921-SSLVPN-TEMP & rebooting the 2911 router I do not have access SSL commands.Show license indicates that 2900-SEC-TEMP & 2911-2921-SSL-TEMP licenses are active but NOT IN USE.

Cisco Switching/Routing :: Any Configuration Guide For EHWIC-4ESW Card

Any configuration guide for EHWIC-4ESW card. Also the difference in configuration between EHWIC-4ESWG and HWIC-4ESW if any?

Cisco WAN :: Number Of EHWIC / HWIC In 2911?

According to specifications fo Cisco ISR G2 2911, it has got 4 EHWIC slots. But in [URL] appears that Cisco2911 supports only 2 HWIC-2FE or only 2 EHWIC-1GE-SFP-CU.

Cisco WAN :: Can Populate All 4 EHWIC Slots In 2911 Router With VWIC3-4MFT-T1/E1 Cards

Can I populate all 4 EHWIC slots in a Cisco 2911 router with VWIC3-4MFT-T1/E1 cards supporting clear channel T1 data traffic?Or do I need a higher performance router inthe 3900 series to do this?The data sheets lead me to the conclusion that I can but I just want to validate this.

Cisco WAN :: 2921 Router Not Detecting EHWIC-1GE-SFP-CU Card

I just got a brand new Cisco 2951 router that has built-in 3 gigabit interfaces cards. We want to add additonal 2 GE EHWIC-1GE-SFP-CU card to it. When it booted up and type show inventory, it did not detect the presence of the card. There was light on at the back of it. I have checked the compatibility on Cisco. The card is compatible with this router. Do we have to install the card with special instructions in order for the router to see it?

Cisco Wireless :: High CPU On 2921 With EHWIC Card?

I am getting the following error message on a Cisco 2921 as a result of which has a there is 99 % CPU util. This router has the following cards installed and 4G WWAN EHWIC is running 15.1(4) M3 image.
EHWIC_CELL_MSG-1-EHWIC_ERROR_EVENTS: eHWIC Error Event: TxCLK PLL lost lock, HWIC slot 3

Cisco Firewall :: Enabling IPS On 2911 Router?

I enable the IPS on the 2911 router . I am using the Basic IPS signatures that are inbulid on the routers . But sill it showing , that no signature is active .
ip ips signature-category
category all
retired true
ip ips signature-category
category ios_ips basic
retired false
[code]....

Cisco Switching/Routing :: 2811 And EHWIC VA DSLA Connection Configuration

I am having trouble setting up a EHWIC-VA-DSL-A= card on my cisco 2811 running the following the following:c2800nm-adventerprosek9-mz.151-4.M2.bin and C2800NM_RM2.srec.124-13r.T11
My hardware supplier tells me its the right adsl card (have 1 existing working card not the same) but the card will not detect on the system to be configured.is this the right card? am I missing something?

Cisco Switching/Routing :: EHWIC-1GE-SFP-CU MPLS Labeled Packets Are Not Being Processed

We have the problem that MPLS labeled packets are not being processed on EHWIC-1GE-SFP-CU if L3PDU + Shim-Header exceeds 1500 bytes.When we move the config exactly to the on-board Interface Gi0/0 it works with put any problems. [code]

Cisco Switching/Routing :: Configuring 1941 With 8 Port EHWic Switch Module And Onboard GE Ports In Single LAN?

Can you configure a Cisco 1941 to use an 8 port EHWic module and the 2 onboard GE ports in a single LAN?
I've discovered you can't have the on GE ports associated with a VLan, and I'm when I've previously researched for a solution, bridging was mentioned but I cannot seem to get it to work (or completely understand it)The reason I would like to use all 10 ports on for the LAN is becuase I have 10 devices I need to connect to the 1941?

Cisco WAN :: Can't Use Ehwic-3g-hspa-u Card In 2800 Series And 1841 Series Router

why I can't use cisco ehwic-3g-hspa-u card in cisco 2800 series and 1841 series router?documentation said that it should work with that devices but when I installed it, it doesn't work even as device i can't see I am using cisco latest ios advance ent. 15.1(4)M4?

Cisco Switching/Routing :: Enabling Gui On 881 Router?

I have an 881 router here in house and am attempting to enable the gui interface on the router.
I have tried the steps to enable http but have not had any success. Below is the IOS Version and the portion of the show config that reflects the http allow:
ROM: System Bootstrap, Version 12.4(15r)XZ2, RELEASE SOFTWARE (fc1)
Cisco 881 (MPC8300) processor (revision 0x100) with 249856K/12288K bytes of memory.
Processor board ID FTX1249Y16Q
[Code].....

Cisco Switching/Routing :: Enabling Jumbo On 6509?

does enabling jumbo frames on the 6509 require a reboot?

Cisco Switching/Routing :: Enabling Ssh Connection On WS-C2960-24TC-L

I have two WS-C2960-24TC-L Switch with Software Ver 12.2(25r)SEE6 with image c2960-lanbase-mz.122-35.SE5.bin and 12.2(25r)SEE1 with image c2960-lanbase-mz.122-25.SEE2.bin currently on it.
I want to enable SSH connections on the switches and believe I need to import the cryto image onto the switch. I would like to upgrade it to new version that can also support ssh connection but not sure which image to download from cisco. The switches are now live.
System image file is 'flash:c2960-lanbase-mz.122-35.SE5/c2960-lanbase-mz.122-35.SE5.bin'
cisco WS-C2960-24TC-L (PowerPC405) processor (revision H0) with 61440K/4088K
[Code].....

Cisco Switching/Routing :: Enabling Flow-control In 2960s?

I met a strange problem after enabling flow-control in 2960s.my enviroment,
- 2 cisco 2960s 24ts-l have been created a stack
- IOS is 12.2(58)se2
- all ports have been enabled flowcontrol receive dersied
via show flowcontrol, I can see each Gigabyte Port have been enabled 'flowcontrol receive desired' but, when I do the following tests
- connect equallogic ps4000xv to the port 21, I found the status of port is 'input flow-control is off'
- connect one server with Broadcom Gigabyte Network adapter, which has been enable TX ON RX ON, or Auto, the status of the port is still 'input flow-control is off'
I guess, the port status should be 'input flow-control is on'. Test them with another port, I got the same result. why?

Cisco Switching/Routing :: Enabling Jumbo Frame On N7K With FEX Attached

I have a pair of N7K's in vPC topology with some FEXs attached. I am looking into enabling Jumbo frame on the N7K as well as the FEX. I understand Jumbo frame is enabled globally by default.
My question is I have some interfaces in a port-channel that I need jumbo frame enabled. Do I enable it at the port-channel interface or at the physical interface ? and is the change disruptive to the network ? I am running NX-OS 6.0.2.

Cisco Switching/Routing :: 6500 QoS Not Enabling Rcv-queue Defaults

One one of our Cisco 6509s I've globally enabled QoS and set a port to 'trust cos'. However when I look at the queueing for that interface, I notice that the receive queue thresholds have not changed to the default.
I'm kind of new to QoS so I'm not sure if I'm missing something.
We are using a Cisco 6509 running 12.2(33)SXI3 using the WS-X6724-SFP card. I thought I'd be seeing the default tail-drop thresholds, but instead I still see the defaults as if QoS were not enabled:
Queueing Mode In Rx direction: mode-cos
Receive queues [type = 1q8t]:
Queue Id Scheduling Num of thresholds
[Code].....

Cisco Switching/Routing :: Enabling Rapid-PVST In Catalyst 6513?

I can not enable to rapid- protocol in catalyst 6513, does not support for it, only support pvst.
Someone how can i enable to rpvst? You know if is necessary to upgrade IOS, it has
s72033_rp-ENTSERVICESK9_WAN-M - 12.2(18)SXF9 IOS. The cisco software Advisor could not localized the features fot this IOS.

Cisco Switching/Routing :: Catalyst 2960 Drops Packets After Enabling QoS

why the QoS deployment causes ports on 2960 switches to drop packets although there is no bandwidth contension? (output bit/second of the interface)packet drops at threshold 1, queue 2 ( queue 3 in config)
We are using Catalyst 2960 switches and are experiencing issues with QoS. After the QoS, we experience a lot of packet drops and it make the network slow. It appears that the slow performance relates to the egress queuing of each port.
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE5
WS-C2960-48TT-L
switch_06#show inter fa0/1 in drops queue output
input flow-control is off, output flow-control is unsupported
Last input never, output 00:00:01, output hang never
[Code].....

Cisco Switching/Routing :: Enabling Jumbo Frames On Existing 3560

I have a pair of Catalyst 3560 GB switches that are trunked with two of the standard ports, and that have trunk ports connecting to a failover pair of PIX 515e's. We're considering adding a pair of cluster database nodes and an iSCSI SAN, both of which would need a dedicated interconnect VLAN that I'd like to employ Jumbo frames on. I don't necessarily need the VLANs to traverse the firewall trunks since they're private interconnects, but I need each host to traverse the switch trunks.
Since it seems I can only enable Jumbo frames on the entire switch (current standard frame size is 1500 and jumbo is also 1500), when I enable it what kind of possible negative impact could this have on my trunked ports as well as my host connections? I've read mixed reviews of users with iSCSI SAN devices seeing terrible performance when enabling jumbo frames so I'm apprehensive about enabling them on an existing network.

Cisco Switching/Routing :: 4500 - Enabling DHCP Snooping On 1 VLan?

I got some problem with enabling dhcp snooping on 4500 (cat4500e-lanbasek9-mz.122-54.SG.bin) the topology is as below: dhcp snooping enabled only on CORE (with interface trusted to dhcp server)the problem is that I put these 2 commands
ip dhcp snooping
ip dhcp snooping vlan 1
but it is not enabled on any vlan
SW-CORE#sh ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
none
DHCP snooping is operational on following VLANs:
[Code]...
On B1 if I turn it on there is a '1' in the section ' DHCP snooping is configured on following VLANs:' but on core no.As you can see I did put the trusted on the interface in the direction to the dhcp.First I thought it can be a problem with option 82, I've read a lot about the issues with that, but the problem would be explicable if the client did receive IP address, but it does.

Cisco Switching/Routing :: 3550 - Two MST Instances Enabling Root Guard

I have 2 3550 12G switches that I use as core fiber switches. Switch 1 is the primary for 1/2 the V LANs and Switch 2 is the primary for the others using MST with 2 instances (I am not including the default 0 instance). I am using HSRP to provide redundancy. So far so good.
Recently a tenant in my building would like to use their own switch for data but still needs access to a V LAN on mine for voice. Again not a problem as I can configure a trunk port and give them what they need. My concern is that if they try to configure STP on their switch can they take down mine. Are there some preventions that I can put into place, such as root guard, that work with MST? What happens if they too set up MST can they kill mine?
Switch 1 is the root for 1/2 the v lans and Switch 2 is the backup root. The scenario is flipped for the other 1/2.

Cisco Switching/Routing :: Enabling Jumbo Frame Con Catalyst 4500 WS-X4648-RJ45-E

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I want to enable jumbo frame con a Catalyst 4500, specifically in the WS-X4648-RJ45-E card. (running this IOS version Version 12.2(53)SG1).
For what I checked, this are the only needed commands:
vlan xxx
mtu 9000
interface port 4
mtu 9000
exit
I want to be sure that these are the only needed comands and that they won t generate any disruption.

Cisco Switching/Routing :: Full Switch Outage After Enabling Jumbo Frames On Nexus 5010

I attempted to enable jumbo frames on a Nexus 5010 (NX-OS version 4.2(1)N1(1)). I created the policy map below and lost access to the switch.
policy-map type network-qos jumbo
class type network-qos class-default
mtu 9216
After recovery I see from the logs that all vlans and interface were suspended. I've attempted to look for reasons for a compatibility issue but I am unable to find what is checked and what could have been incompatible. The other troubling thing is the adjacent switch suspended its interfaces too but no change was done there. What I need to look out for so that this does not happen again?
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 1,10,601 on Interface port-channel1 are being suspen
ded. (Reason: QoSMgr Network QoS configuration incompatible)
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-5-IF_TRUNK_DOWN: Interface port-channel1, vlan 1,10,601 down
2011 Nov 22 23:43:09 phx-ipcg1dwfcma %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs 10 on Interface port-channel508 are being suspended.
[code]....

Cisco Switching/Routing :: 2911 With IOS Version Is 15.1 - Routing Table Not Updating

I am using Cisco 2911 & IOS version is 15.1. My problem is that after some days (e.g. 15-20 days), the routing table suddenly stops updating & then I have to enter the default route again to make it up. I am using Track 1 to track default route here. After primary link goes down, the Track is also going down but after coming the primary link up, the track is not coming up. So, I have to add the default route again to make it up.

Cisco WAN :: 2911 Does Not Support NM-E3/T3 Serial Card?

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From all of the documentation I am seeing, the 2911 does not support the NM-E3/T3 serial card.

Cisco WAN :: Which Type Of HWIC Card Should Use In 2911-sec / K9 Router

I have cisco 2611 + NM1E , and i want to trade in for a cisco 2911 security router + HWIC4 Card.Which type of HWIC card should i use in the cisco2911-sec/k9 router?

Cisco Switching/Routing :: How To Install New IOS 15.1 On 2911

i downloaded and transfered the new ios to the 2911, but no install routine started.

Cisco WAN :: Does VWIC2-2MFT-T1/E1 Card Work With 2911 Router

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I purchased a 2911 months ago to connect a remote site via T1 circuit.I think I might be missing some hardware to make this work on the remote end. Currently have a VWIC2-2MFT-T1/E1 card.Does this WIC actually work with this router? So no reference that this VWIC works with 2911.

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Cisco Switching/Routing :: 2911 SFP Interface Number

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I am configuring my first 2911 using a SFP card but I dont know the interface name for this module.
show inv shows the card..
What is the interface number for this card or if it needs some config before it will recognize the interface?