# Modifying tunnel hop limits

Modify tunnel hop limits to update hop limit values on previously configured tunnels.

## Procedure steps

1. From the navigation tree, double-click IPv6.

2. Double-click Tunnel.

3. Click the Tunnel Interfaces tab.

   OR

   Click the Tunnel Interface button.

4. In the row for the tunnel to configure, double-click the HopLimit column to modify the displayed information, as required.

5. Click Apply.

## Variable definitions

The following table describes the fields of the Tunnel Interface tab.

Variable | Value
--- | ---
Index | Identifies the tunnel interface internally. The value is derived from the tunnel ID.
EncapsMethod | Displays the tunnel mode: IPv6 for manually configured tunnels and 6to4 for automatically configured tunnels.
HopLimit | Configures the maximum number of hops in the tunnel. The default value is 255.
Security | Indicates the type of security on the tunnel interface.
TOS | Displays the method used to configure the high 6 bits (the differentiated services codepoint) of the IPv4 type of service (TOS) or IPv6 traffic class in the outer IP header. A value of —1 indicates that the bits are copied from the payload header. A value of —2 indicates that a traffic conditioner is invoked and more information can be available in a traffic conditioner MIB module. A value from 0 to 63 indicates that the bit field is configured to the indicated value.
FlowLabel | Displays the method used to set the IPv6 Flow Label value. This object need not be present in rows where tunnelIfAddressType indicates that the tunnel is not over IPv6. A value of —1 indicates that a traffic conditioner is invoked and more information can be available in a traffic conditioner MIB. Any other value indicates that the Flow Label field is configured to the indicated value.
AddressType | Displays one of the following values: Manual — a manually configured tunnel 6to4 for autoconfigured tunnels.
LocalInetAddress | Identifies the local endpoint address of the tunnel.
RemoteInetAddress | Identifies the remote endpoint of the tunnel.
EncapsLimit | Displays the address of the local endpoint of the tunnel (that is, the source address used in the outer IP header). If the address is unknown, the value is 0.0.0.0 for IPv6 or :: for IPv6. The tunnelIfAddressType displays the object type.