Found inside – Page 484s1 s2 Internet h1 h2 □ Up to 1000 peers for the Cisco 7600 series router (or ... This functionality allows the line protocol of the tunnel interface to ... Found inside – Page 2771 on Tunnel O from FULL to DOWN, Neighbor Down : Interface down or detached %LINE PROTO-5–UPDOWN: Line protocol on Interface Tunnel0, changed state to down ... All rights reserved. Found inside – Page 3162 Configure keepalives on the R1 tunnel to 2 seconds , so if it missed three ... -5 - UPDOWN : Line protocol on Interface Tunnel3 , changed state to down ... Up/down - This implies that, even though the tunnel is administratively up, something causes the line protocol on the interface to be down. Hurricane Electric's IPv6 Tunnel Broker Forums, Topic: tunnel up line protocol down (Read 12715 times). Cisco ethernet … Guest. I wonder what can cause that the first line output of the command "show interfaces" will be: "fastEthernet is up, line protocol is down". Reset/down - This is usually a transient state when the tunnel is reset by software. The basic rules do not cover the case in which the GRE tunneled packets are successfully forwarded, but are lost before they reach the other end of the tunnel. 0 unknown protocol drops 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. The tunnel was just reset. The next hop server is misconfigured. Top. Found insideWhen the number of retries exceeds the configured value, the line protocol will be brought down on the tunnel interface on VPNSPOKE1EAST. In the up/down ... tunnel-protocol gre source LoopBack1 destination 10.1.2.61 interface LoopBack1 description GRE_Source ip address 172.17.2.253 255.255.255.255 target-board 1 binding tunnel gre It is found that the source interface of the GRE tunnel is on the board in slot 1. Line protocol on Interface Tunnel0, changed state to down 07:12:59: %LINEPROTO-5-UPDOWN: What could be the reason for the tunnel flapping? A … Found insideIn an aggressive design, the headend routing protocol can scale up to 500 ... interval and number of retries, the tunnel line protocol is marked “down. The keep alive is 3 2 on both of them. what should i do in order to have … If the tunnel status is UP, verify that the Details column has one or more BGP routes listed. crypto ikev2 . Note: GRE tunnel keepalives are only valid and have an effect on P2P GRE tunnels; they are not valid and do not have any effect on mGRE tunnels. Found inside – Page 382For example, distance-vector routing protocols (such as RIP) generally select ... might be that the tunnel interface is up, but the line protocol is down. There are so may little "gotchas" when it comes to certain images only supporting certain things. Go to VPN > IPsec Tunnels and create the new custom tunnel or edit an existing tunnel. Tunnel is up, line protocol is down Hi, I have two cisco routers with tunnels between them. Found inside – Page 137Example 23 shows reconfiguration on R2 for the tunnel interface address mask and MTU to ... is up, line protocol is up Internet Address 120.100.40.2/29, ... . This was committed with Cisco bug ID CSCum34057 (initial attempt with Cisco bug ID CSCuj29996 and then backed out with Cisco bug ID CSCuj99287). Tunnel 1 is up line protocol is down Description: Tunnel Interface Internet address is X.X.X.X 255.255.255.255 Source Y.Y.Y.Y Destination X.X.X.X Tunnel … This means that each tunnel endpoint does not keep any information about the state or availability of the remote tunnel endpoint. Found inside – Page 883Table 23–39 Show Interfaces Tunnel Field Descriptions , Continued Field Description line protocol is { up | downl Shows line protocol up if a valid route is available to the tunnel administratively down } destination . I added protocol=!gre to the connection-state=invalid action=drop rule, and enabled pptp. Found inside – Page 187Finally, referring back up to R1's configuration, its tunnel destination ... show interfaces tunnel0 Tunnel0 is up, line protocol is up Hardware is Tunnel ... R1#show ip interface tunnel 100 Tunnel100 is up, line protocol is up Internet address is 102.1.1.1/24. Note about tunnel state: A tunnel interface is in up/down state right after we create it (with the "interface tunnel <tunnel-number>" command). Apologies for that not being clear. Phase 2 of Internet Protocol Security (IPSec) is established, but BGP isn't established. We can only put it into "administratively down/down" by . Question Which two issues might cause excessive runt and giant frames in an Ethernet network? In order to better understand how GRE tunnel keepalives work, refer to GRE Tunnel Keepalives. 0 unknown protocol drops 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. by Guest » Thu Jun 24, 2010 3:41 am. This allows for the installation of an alternate (floating) static route or for Policy Based Routing (PBR) in order to select an alternate next-hop or interface. The encapsulation on the Serial0/0/0 interface is incorrect. could it be anything to do with keep alive? You should see that the tunnel interface is now showing as an interface on your router. The most important statistic of the show interface command is the output of the line and data-link protocol status. Up/up - This implies that the tunnel is fully functional and passes traffic. Found inside – Page 3-26To determine whether the tunnel interface is up or down, use the show ip ... manual up up R1# R1# show interface Tunnel 0 Tunnel0 is up, line protocol is up ... Found insideAfter configuring the tunnel source and destination IP addresses, the router prompts that the “line protocol on Interface Tunnel0” changed state to up: ... MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255. Found inside... Local interface: FastEternet0/0.10 up, line protocol up, Eth VLAN 10 up Destination address: 192.168.1.102, VC ID: 10, VC status: down Tunnel label: not ... Use this to confirm that all configurations match on both sides of the tunnel Note: This includes third party equipment. In my example, 63.1.1.2 was the source and 63.1.1.1 was the destination. Encapsulation TUNNEL, loopback not set. The cisco line/protocol status of up/down doesn't mean that it's flapping. Open the Phase 2 Selectors panel (if it is not available, you may need to click the Convert to Custom Tunnel button). Conditions: Interop testing with external Cloud Platform IPSec VPN service Example Config: crypto ikev2 proposal VPN_SCALE_TEST_IKEV2_PROPOSAL encryption aes-cbc-256 aes-cbc-192 aes-cbc-128 integrity sha256 group 16 ! Review the Status of your VPN tunnel. Branch#show interfaces tunnel 1 Tunnel1 is up, line protocol is up Hardware is Tunnel Internet address is 192.168.13.3/24 MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive not set Tunnel source 192.168.23.3 (FastEthernet0/0), destination 192.168.12.1 . The controller operates as a layer-2 switch that uses a VLAN as a broadcast domain. Specifically, if the line protocol for an interface is changed to down, then any static routes that point out that interface are removed from the routing table. In Cisco IOS Software Releases 15.4(3)M/15.4(3)S and later, the GRE tunnel line protocol state will follow the IPsec Security Association (SA) state, so the line protocol will remain down until the IPsec session is fully established. Yeah not all IOS image feature sets support the 6in4 tunneling needed to use a HE.net tunnel. In the ASDM (Version 6.3): Go to Monitoring, then select VPN from the list of Interfaces; Then expand VPN statistics and click on Sessions. As a layer-2 switch, the controller requires an external router to route traffic between VLANs. Down/Up - The tunnel is down and the line protocol is up. GigabitEthernet0/0 is up, line protocol is down (disabled) Hardware is CN Gigabit Ethernet, address is 00e0.8fc7.5901 (bia 00e0.8fc7.5901) MTU 1500 bytes, BW 1000000 … Down/Down - The tunnel and line protocol are down. Run the display this interface or display ip interface brief command on the … You can use the standard show interface command on a tunnel interface to see a considerable amount of useful information about it: Router1# show interface Tunnel5 Tunnel5 is up, line protocol is up Hardware is Tunnel Internet address is 192.168.66.5/30 MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255 . How do I check the AWS VPN tunnel status? If the indicator of a connected interface on CloudEngine series switches is off, the interface is not up. The below topics discusses the tunneling of GRE, encapsulation and de-capsulation process, configuring GREs and verifying the working of GREs. Up/down - This implies that, even though the tunnel is administratively up, something causes the line protocol on the interface to be down. Last Modified . Symptom: Shut/no-shut of the VTI tunnel leaves the tunnel in Up/Down state. Found insidePIM (0): Initiating register =ncapsulation tunnel creation for RP 10, 224, ... DOWN: Line protocol ori Interface Tunnell, changed state to up PIM (0) ... Found insideNote To further clarify, the spoke-to-hub registration is taken down and shows as the ... The actual tunnel interface still has a line protocol state of up. Correctly set tunnel source and destination and verify connectivity between said … AymanDasa asked on 1/14/2010. IP looks up the route to the destination address and learns that it is through the tunnel interface, which returns the packet to Step 1 above; hence, there is a recursive routing loop. If the tunnel status is UP, verify that the Details column has one or more BGP routes listed. However, it does not have to be reachable, which can be seen from this ping test: There is no route, which includes the default route, to the tunnel destination address. Found insideAfter configuring the tunnel source and destination IP addresses, the router prompts that the “line protocol on Interface Tunnel0” changed state to up: ... CLI: > show vpn ipsec-sa by Guest » Thu Jun 24, 2010 3:41 am. GRE tunnels are designed to be completely stateless. Found inside – Page 398The use of routing and bridging is on a per-protocol basis. ... partial sample display: Serial 0 is administratively down, line protocol is down Hardware is ... * The clock rate is not set on the DTE. Ben helps you troubleshoot issues with VPN tunnels. Tunnel0/0/1 current state : UP Line protocol current state : DOWN Description: Route Port,The Maximum Transmit Unit is 1500 Internet Address is 5.5.5.1/24 … This book focuses on real-world applications, from design scenarios to feature configurations to tools that can be used in managing and troubleshooting MPLS TE. Assuming some familiarity with basic label operations, this guide focuses ... Fault Symptom. The IP address of the tunnel interface and the physical and data link status shows as up/up. Hardware is Tunnel. The output of the show ip interface brief command indicates that Serial0/0/0 is up but the line protocol is down. Tunnel interface protocol is down. Method Status Protocol FastEthernet0/0 10.10.10.2 YES manual up up … The firewall showed that its interface was up/up, the other end of the cable (a Cisco 3560-X) said; GigabitEthernet0/23 is up, line protocol is down (monitoring) Hardware is Gigabit Ethernet, address is 5087.89ed.4917 (bia 5087.89ed.4917) Description: Uplink-To-Firewall MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255 . For mGRE tunnel interfaces, since there is no fixed tunnel destination, some of the previous checks for P2P tunnels are not applicable. Packet Sent The number of packets sent on the tunnel since it was last . You can also use Amazon CloudWatch to check the status of a VPN tunnel, be notified when the status of the tunnel changes, and access metric data over time to help evaluate the tunnel's stability. Found insideThe actual tunnel interface still has a line protocol state of up. During normal operation of the ... If the tunnel is not being used, it is torn down. The "show interface" command on a Cisco IOS router or switch gives you a lot of information. Found inside – Page 268Example 9-14 show interfaces tunnel 0 Command Output on RI R1 # show interfaces tunnel o Tunnel is up , line protocol is up Hardware is Tunnel Internet ... We will also discuss the problems with MTU size reduction due to tunnels and the Path MTU . Next, notice the states of LCP, IPCP and CDPCP. <HUAWEI> display interface 10ge 1/0/5 10GE1/0/1 current state : DOWN(Transceiver type mismatch) (ifindex: 198) Line protocol current state : DOWN---- More ---- Found inside – Page 36A routing loop occurs when the passenger protocol and the transport protocol are identical . ... Another indication that a recursive route loop has been detected is if the tunnel interface is up and the line protocol is down . Found insideThoroughly revised and expanded, this second edition adds sections on MPLS, Security, IPv6, and IP Mobility and presents solutions to the most common configuration problems. 6.2.1.BASE. How do I check the current status of my VPN tunnel? Tunnel1 is up, line protocol is down. This causes data packets that go through the GRE tunnel to be "black holed", even though an alternate route that uses PBR or a floating static route via another interface is potentially available. BGP over GRE Tunnel. Yeah not all IOS image feature sets support the 6in4 tunneling needed to use a HE.net tunnel. There are four possible states in which a GRE tunnel interface can be: When a tunnel interface is first created and no other configuration is applied to it, the interface is not shut by default: In this state, the interface is always up/down: This is because the interface is administratively enabled, but since it does not have a tunnel source or a tunnel destination, the line protocol is down. DOWN: The link layer protocol of the tunnel interface is abnormal. I had an interesting issue configuring this on 3 2620 routers running 12-3(22). tunnel destination 122.128.223.122. tunnel protection ipsec profile TEST. Re: tunnel up line protocol down. Line Protocol Status With APS. In this example, a misconfigured ipc zone default configuration causes redundancy to be in the NEGOTIATION state and keeps such tunnel interfaces in a down state: In addition to checking the reasons previously outlined, the tunnel line state evaluation for the tunnel down reason can be seen with the show tunnel interface tunnel x hidden command as shown here: Note: There is an open enhancement to make the tunnel down reason more explicit in order to indicate that it is due to the redundancy state not being active. Hardware is Tunnel. This added an additional check, which keeps such tunnel interfaces in the line protocol down state until the redundancy state changes to ACTIVE. With the assumption that there is a way to reach the far end tunnel endpoint and the tunnel line protocol is not down due to other reasons, the packet arrives … I don’t see network traffic flowing on the AWS side of my Amazon Virtual Private Cloud (Amazon VPC) connection. Monitoring VPN Tunnels Using Amazon CloudWatch, Verify that the security groups of Amazon Elastic Compute Cloud (Amazon EC2) instances in your VPC allow appropriate access. Packet Received The number of packets received on the tunnel since it was last cleared by the administrator. Jan 12, 2020. Tunnel1 is up, line protocol is down. my question is how can make the protocol of tunnel 1 and 2 up, by the way when i make reload … See example below for command to identify tunnel device name and peer ip and then add route. I thought "vrf forwarding" would keep the tunnel interface in the GRT. Description (partial) Post. The route to the tunnel destination address is through the tunnel itself. Found insideOnce the tunnel source interface or source IP address is advertised int ... generated 01:56:24.808: %LINEPROTO-5-UPDOWN: Line protocol on Interface ... The line protocol on an interface configured with PPP comes up only when all LCP and NCP sessions are negotiated successfully. All rights reserved. B. There's an MTU issue on the tunnel interface. Found insideThe only tricky part of configuring a tunnel is making sure that the source of ... interfaces tunnel1 Tunnel1 is up, line protocol is up Hardware is Tunnel ... Found inside – Page 324To determine whether the tunnel interface is up or down, use the show ip ... Tunnel on R1 R1# show interfaces tunnel 0 Tunnel0 is up, line protocol is up ... Link protocol status of the Tunnel 0/0/2 interface: UP: The link layer protocol of the tunnel interface works normally. Down/Up - The tunnel is down and the line protocol is up. Tunneling interface protocols This page describes all available tunneling protocol usable in /etc/config/network and their options. This document describes scenarios where other factors might influence the state of the GRE tunnel. VPN devices that don’t support Border Gateway Protocol (BGP) must use static routing. : $ ip address 4: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1400 qdisc fq_codel state UNKNOWN group default qlen 3 link/ppp inet 10.192.168.40 peer 192.0.2.1/32 scope global ppp0 valid_lft forever preferred_lft forever To check if phase 2 ipsec tunnel is up: GUI: Navigate to Network->IPSec Tunnels GREEN indicates up RED indicates down. For more information, see Monitoring VPN Tunnels Using Amazon CloudWatch. Internet address is 76.70.73.74/30. If this tunnel were to be changed to a multipoint GRE (mGRE) tunnel, then all that is required for the tunnel to be in an up state is a valid tunnel source (an mGRE tunnel can have many tunnel destinations, so that cannot be used to control the tunnel interface state): At any point, if the tunnel interface is administratively shut down, the tunnel immediately goes into an administratively down/down state: Normally, a P2P GRE Tunnel interface comes up as soon as it is configured with a valid tunnel source address or interface which is up and a tunnel destination IP address which is routable as shown in the previous section. So, if i take "vrf forwarding CUSTNAME" off of tunnel 94, the tunnel is up and pingable, but I need to send the VRF to the remote router. Found inside – Page 253Router#sh int s0/0/0 Serial0/0 is up, line protocol is up Hardware is HD64570 MTU 1500 bytes ... 0 output buffers swapped out 0 carrier transitions DCD=down ... Router# show interfaces ethernet 0/0 Ethernet0/0 is administratively down, line protocol is down Hardware is AmdP2, address is 0003.e39b.9220 (bia 0003.e39b.9220) Internet address is 1.1.1.1/8 MTU . It is then matched against Tunnel 0, becomes decapsulated, and is forwarded to the destination IP which is the tunnel source IP address on Router A. CCNA (ICND2) Cert Practice Exam 1. This is probably my biggest … Some example configurations are provided at the end of the page. Internet address is … Keepalives on the GRE tunnel interface are used in order to solve this issue in the same way keepalives are used on physical interfaces. Basically when the tunnels come up the commands tell the router to get to the remote end of the GRE tunnel to use the tunnel interface.. That's the case, because the tunnel is down. Re:Tunnel is up, line protocol is down. After the tunnel interface name is changed to Tunnel 1/0/0, the GRE tunnel becomes up. FastEthernet0/1 VLAN 1 vty 0 console 0 2. A valid tunnel source consists of any interface that is itself in the up/up state and has an IP address configured on it. Found inside – Page 322例6.5.6 宛先の指定ミス Router1#show interface tunnel 0 Tunnel0 is up, line protocol is down Hardware is Tunnel Internet address is 192.168.0.1/30 MTU 17916 ... Found inside... down down Tunnel0 10.1.3.1 YES manual up up The show interfaces tunnel ... show interfaces tunnel0 Tunnel0 is up, line protocol is up Hardware is Tunnel ... You can reset the tunnel via the ASDM software as well as in the command line. You can click on the Tunnel info to get the details of the Phase2 SA. Found insideup up up Status Protocol GigabitEthernet0/0 10.1.1.9 YES manual up ... administratively down down Tunnel0 10.1.3.1 YES manual up The show interfaces tunnel ... 0 unknown protocol drops 0 output buffer failures, 0 output buffers swapped out . Reset/down - … C. The router is trying to route to the tunnel destination address using the tunnel interface itself. (Choose two.) In order to make this interface up/up, a valid tunnel source and tunnel destination must be configured: So far, the tunnel has been configured as a point-to-point (P2P) GRE tunnel, which is the default. Verify whether you are using static or dynamic VPN routing. Found inside – Page 89Example 3-13 Tunnel Failure at SITE2 SITE2 - r ( config ) #interface tunnel0 SITE2 ... Method Status Protocol Serial0 / 0 10.0.3.11 YES NVRAM up Loopbacko ... 47. Cisco Bug: CSCvc78926 - GRE tunnel is up but line protocol is down with GRE tunnel keepalive configuration on CRS Topaz. Found inside – Page 460... Line protocol on Interface Tunnel1, changed state to down ... ms IOU7#sh int tunnel1 Tunnel1 is up, line protocol is up Hardware is Tunnel Internet ... Re: tunnel up line protocol down. Under normal circumstances, there are only three reasons for a GRE tunnel to be in the up/down state: These three rules (missing route, interface down, and misrouted tunnel destination) are problems local to the router at the tunnel endpoints and do not cover problems in the intervening network or other features related to the GRE tunnel that might be configured. I followed your example but couldn't get my tunnel interfaces to come up, tunnel was up, line protocol was down It wasn't until I supplied the "tunnel key" command on all 3 of my tunnel interfaces, that the tunnels came up and traffic was flowing fine. With this change, the tunnel interface dynamically shuts down if the keepalives fail for a certain period of time. Note that, for most protocols, installing an opkg package is required for protocol support. native VLAN mismatch damaged […]Continue reading. Post. Found inside – Page 109To fix the problem, do not modify any tunnel or EIGRP parameters. ... %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to down 4d10h: ... Configuring VLANs. As the tunnel never really comes up in a stable way, you don't know, how the routing table would be, if the . In above example its "Serial 0/0/0 is up, line protocol is down" which indicates that physical layer is working properly but there is some issue in data link layer configuration. Products (1) Cisco Carrier Routing System ; Known Affected Releases . How do I troubleshoot BGP connection issues over VPN? Run the display interface command on the device to check the interface status. crypto ikev2 policy VPN_SCALE_TEST_IKEV2_POLICY proposal VPN_SCALE_TEST_IKEV2_PROPOSAL ! For more information, see. After a tunnel interface is created, its physical layer status is Up. The ability to mark an interface as down when the remote end of the link is not available is used in order to remove any routes (specifically static routes) in the routing table that use that interface as the outbound interface. Up/Down - The tunnel is up and the line protocol is down. Found inside – Page 342Let's take a look at the interface with the show interfaces tunnel 0 command. Corp#sh int tun 0 Tunnel0 is up, line protocol is up Hardware is Tunnel ... Select Advanced. If the tunnel status is DOWN but the Details column is IPSEC IS UP, be sure to configure BGP properly on your firewall. It is both administratively up and it's protocol is up as well. A consequence of this is that, by default, the local tunnel endpoint router does not have the ability to bring the line protocol of the GRE Tunnel interface down if the remote end of the tunnel is unreachable. Generic routing encapsulation (GRE) is a virtual point to point link that encapsulates data traffic in a tunnel . . In … The number of interface that is UP in Protocol is 4 The number of interface that is DOWN in Protocol is 22 Interface IP Address/Mask Physical Protocol VPN GigabitEthernet0/0/0 192.168..1/24 down down l3vpn LoopBack1 172.17.2.253/32 up up(s) -- Found inside – Page 170Tunnel interfaces are numbered like all interfaces in IOS, with the first being ... Line protocol on Interface Tunnel0, changed state to down Tunnels must ... VLAN1 is up, line protocol is up Hardware is EtherSVI, Address is 00e0.0f42.0071(00e0.0f42.0071) MTU 1500 bytes, BW 1000000 kbit, DLY 2000 usec Encapsulation ARPA, loopback not set 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 multicasts Procedure. AymanDasa asked on 1/14/2010. Choose the type of tunnel you're looking for from the drop-down at the right (IPSEC Site-To-Site for example.) We cannot put it into down/down state, even if we shut down the source interface. R1#show ip interface tunnel 100 Tunnel100 is up, line protocol is up Internet address is 102.1.1.1/24. Also there are other applications that trigger when an interface changes state; for example, 'backup interface
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