Hello Everyone, I would like to get some clarification on the following scenario. We have two sites which are connected point to point. The switches which connect these sites are managed by our service provider. Our core switch will be directly connected to service provider switch with an access port (10GB) but there is no redundancy from our core switch to service provider's switch. They would like us to connect another link (2 x 1GB port-channel) to their switches until we get the second 10Gb link which will port-channeld with the 10GB link (2 x10GB). Please see the attached diagram for more details. On our core switch, we have vlan10 configured which has a SVI  192.168.10.1. The 10GB port connected to the service provider switch is an access port in vlan 10. The service provide switch has vlan 20 configured with SVI 192.168.10.2 and the ports connected to our core switch is an access port. My question is would there a loop if I connect the second port (2GB link) to their switch? or if the service provider switch with vlan 20 has lower priority than ours then it will become the root our vlan10? I am guessing if we enable BPDU filter on our core switches then it will create a loop? is that right? is it better to have only layer 3 connection and disable BPDUs on the ports connected to the service provider switch. Really appreciate you help.   Thanks Jay   ... View more

Hello All, Could someone please confirm if we can stack the two 3750x switches together as the following - Will this also provide 32 stack ring speed? Thank you in advance. Kind regards, Jay ... View more

Hi Guys, I have received the following error on one of our Core switches. %PM_SCP-2-LCP_FW_ERR_INFORM: module 1 is experiencing the following error: Port ASIC (VISHAKHA) packet buffer failure detected on ports  45 %PM-4-ERR_DISABLE: packet-buffer error detected on Gi1/45, putting Gi1/45 in err-disable state The port Gi1/45 is connected to a server and now it is in err-diabled mode. I have tried to shut and unshut the port but received the following errors - %CONST_DIAG-3-HM_PORT_TEST_FAIL: Module 1 TestNonDisruptiveLoopback Port(s)[45] failed. System operation continues. %HA_EM-6-LOG: Mandatory.go_nondislp.tcl: GOLD EEM TCL policy for TestNonDisruptiveLoopback %PM-4-ERR_DISABLE: diagnostics error detected on Gi1/45, putting Gi1/45 in err-disable state I have checked the port and could not find any errors or drops - DBACoreR01#sh interfaces gigabitEthernet 1/45 GigabitEthernet1/45 is down, line protocol is down (err-disabled)   Hardware is C6k 1000Mb 802.3, address is 001a.2f60.447c (bia 001a.2f60.447c)   Description:   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 0/255, rxload 0/255   Encapsulation ARPA, loopback not set   Keepalive set (10 sec)   Full-duplex, Auto-speed, media type is 10/100/1000BaseT   input flow-control is off, output flow-control is off   Clock mode is auto   ARP type: ARPA, ARP Timeout 04:00:00   Last input never, output never, output hang never   Last clearing of "show interface" counters never   Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 0 bits/sec, 0 packets/sec   5 minute output rate 0 bits/sec, 0 packets/sec      110065 packets input, 13673797 bytes, 0 no buffer      Received 16 broadcasts (12 multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 3 frame, 0 overrun, 0 ignored      0 watchdog, 0 multicast, 0 pause input      0 input packets with dribble condition detected      170240392 packets output, 15793183649 bytes, 0 underruns      0 output errors, 0 collisions, 4 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out I have also checked the module and found a failure on port Gi 1/45 Core01#show diagnostic result module 1 Current bootup diagnostic level: minimal Module 1: 48-port 10/100/1000 RJ45 EtherModule  SerialNo : SAL10489C30   Overall Diagnostic Result for Module 1 : MINOR ERROR   Diagnostic level at card bootup: minimal   Test results: (. = Pass, F = Fail, U = Untested)     1) TestScratchRegister -------------> .     2) TestNonDisruptiveLoopback:    Port  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24    ----------------------------------------------------------------------------          .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .    Port 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48    ----------------------------------------------------------------------------          .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  F  .  .  .     3) TestLoopback:    Port  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24    ----------------------------------------------------------------------------          .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .    Port 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48    ----------------------------------------------------------------------------          .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .     4) TestNetflowInlineRewrite:    Port  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24    ----------------------------------------------------------------------------          U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U    Port 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48    ----------------------------------------------------------------------------          U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U  U     5) TestAsicMemory ------------------> U     6) TestEobcStressPing --------------> U     7) TestFirmwareDiagStatus ----------> .     8) TestAsicSync --------------------> .     9) TestErrorCounterMonitor ---------> .    10) TestLtlFpoeMemoryConsistency ----> . CoreR01#show module Mod Ports Card Type                              Model              Serial No. --- ----- -------------------------------------- ------------------ -----------   1   48  48-port 10/100/1000 RJ45 EtherModule   WS-X6148A-GE-TX    SAL10689C30   3   48  48-port 10/100/1000 RJ45 EtherModule   WS-X6148A-GE-TX    SAL10889C3X   5    5  Supervisor Engine 2T 10GE w/ CTS (Acti VS-SUP2T-10G       SAL1550Y4ZV   8   20  DCEF2T 4 port 40GE / 16 port 10GE      WS-X6904-40G       SAL1669C5GD Mod MAC addresses                       Hw    Fw           Sw           Status --- ---------------------------------- ------ ------------ ------------ -------   1  001a.2f60.4450 to 001a.2f60.447f   1.5   8.4(1)       15.0(1)SY3   Ok   3  001a.2f6f.71f0 to 001a.2f6f.721f   1.5   8.4(1)       15.0(1)SY3   Ok   5  e05f.b911.0a3b to e05f.b911.0a42   1.3   12.2(50r)SYS 15.0(1)SY3   Ok   8  1cdf.0f9b.c05a to 1cdf.0f9b.c06d   1.0   12.2(50r)SYL 15.0(1)SY3   Ok Mod  Sub-Module                  Model              Serial       Hw     Status ---- --------------------------- ------------------ ----------- ------- -------   5  Policy Feature Card 4       VS-F6K-PFC4        SAL1649TUFQ  1.2    Ok   5  CPU Daughterboard           VS-F6K-MSFC5       SAL1646SJJ8  1.4    Ok   8  Distributed Forwarding Card WS-F6K-DFC4-E      SAL1648T7QP  1.2    Ok Mod  Online Diag Status ---- -------------------   1  Minor Error   3  Pass   5  Pass   8  Pass Could anyone please let me know what might be wrong here. is it a hardware faliure? Do I need to raise this with TAC? Really appreciate your help. Thank you, Jay ... View more

Hi All, I am hoping if someone can help me understand how do OSPF neighbors see LSA Type 1 in the same area. Please see the network topology attached. I have got three routers( R1, R2 and R3) in the same area (Area 0) R2 and R3 are directly connected to R1. R2 is advertising two looback addresses to R1 and R3 but when I run Show ip ospf database on to R3 it does not show the loopback addresses. I can see that the routes are being learned by R3 and also the Router links states count reflecting that R2 is advertising the routes. Why are the loopback addresses not shown in IP OSPF database? When I run show ip ospf database router adv-router 2.2.2.2 the output shows that R2 is advertising those routes. R3#sh ip ospf database             OSPF Router with ID (3.3.3.3) (Process ID 1)                 Router Link States (Area 0) Link ID         ADV Router      Age         Seq#       Checksum Link count 1.1.1.1         1.1.1.1         1784        0x80000002 0x003C66 2 2.2.2.2         2.2.2.2         1699        0x80000006 0x003D05 3 3.3.3.3         3.3.3.3         1916        0x80000003 0x00D504 1                 Net Link States (Area 0) Link ID         ADV Router      Age         Seq#       Checksum 10.1.12.2       2.2.2.2         1699        0x80000002 0x00B05B 10.1.13.3       3.3.3.3         1916        0x80000002 0x009F62 R3#sh ip ospf database router adv-router 2.2.2.2             OSPF Router with ID (3.3.3.3) (Process ID 1)                 Router Link States (Area 0)   LS age: 136   Options: (No TOS-capability, DC)   LS Type: Router Links   Link State ID: 2.2.2.2   Advertising Router: 2.2.2.2   LS Seq Number: 80000007   Checksum: 0x3B06   Length: 60   Number of Links: 3     Link connected to: a Stub Network      (Link ID) Network/subnet number: 172.17.2.0      (Link Data) Network Mask: 255.255.255.0       Number of TOS metrics: 0        TOS 0 Metrics: 1     Link connected to: a Stub Network      (Link ID) Network/subnet number: 172.17.1.0      (Link Data) Network Mask: 255.255.255.0       Number of TOS metrics: 0        TOS 0 Metrics: 1     Link connected to: a Transit Network      (Link ID) Designated Router address: 10.1.12.2      (Link Data) Router Interface address: 10.1.12.2       Number of TOS metrics: 0        TOS 0 Metrics: 10 Thank you in advance. Regards, Jay ... View more